Metal

Metal (pronounced met-l)

(1) Any of a class of elementary substances, as gold, silver, or copper, all of which are crystalline when solid and many of which are characterized by opacity, ductility, conductivity, and a unique luster when freshly fractured.

(2) Such as substance in its pure state, as distinguished from alloys.

(3) An element yielding positively charged ions in aqueous solutions of its salts.

(4) An alloy or mixture composed wholly or partly of such substances such as steel or brass.

(5) An object made of metal.

(6) Formative material; stuff.

(7) In printing, as type metal, the stencils used to apply ink; the state of being set in type.

(8) The substance of glass in a molten state or as the finished product; molten glass in the pot or melting tank (mostly in technical use).

(9) As road metal, the crushed rock used in road construction; small stones or gravel, mixed with tar to form tarmac for the surfacing of roads.

(10) To furnish or cover with metal.

(11) In popular music, verbal shorthand for the genre heavy metal (but apparently usually not other variations (thrash; power; gothic; doom; twisted; black; molten; death)).

(12) In admiralty jargon, the total weight of projectiles that can be shot by a ship's guns at any one time; the total weight or number of a ship's guns.

(13) In heavy element astronomy, any atom except hydrogen and helium.

(14) In heraldry, a light tincture used in a coat of arms, specifically argent (white or silver) and or (gold).

(15) In rail construction, the rails of a railway (almost always plural).

(16) In mining, the ore from which a metal is derived (the use to describe the mine from which the ore is extracted is obsolete).

(17) Figuratively, the substance that constitutes something or someone; matter; hence, character or temper (now archaic and replaced by mettle).

(18) In the jargon of civil aviation, the actual airline operating a flight, rather than any of the code-share operators.

(19) In the jargon of drag-racing, a descriptor applied to the largest capacity (usually big-block) engines.

1250–1300: From the Middle English, from the Old French metal (metal; material, substance, stuff), from the Classical Latin metallum (quarry, mine, product of a mine, metal), from the Ancient Greek μέταλλον (métallon) (mine, quarry, ore).  The Greek work picked up the sense of “metal” only in post-classical texts, via the notion of "what is got by mining”; the original meaning was "mine, quarry-pit," probably a back-formation from metalleuein "to mine, to quarry," a word of unknown origin which may be related to metallan "to seek after" but there’s no evidence in support and it’s thought derived from a pre-Greek source because of the presence of -αλλο- (-allo-).  Metal is a noun, verb & adjective and metallic is a noun & adjective; the noun plural is metals.

In the West, what defined a metal was based on the metals known from antiquity: gold, silver, copper, iron, lead, and tin.  The adjectival form (or or covered with metal) emerged in the late fourteenth century reflecting the advances in metallurgy.  The term metalwork is attested from 1724 and has been used to describe both functional and decorative endeavours and is a common title in technical education (al la woodwork).

Iron Butterfly, In-A-Gadda-Da-Vida (1968).  An early heavy metal recording, their previous album was Heavy (1968).

The use to describe a variety of loud forms of popular music (heavy; thrash; power; gothic; doom; twisted; black; molten & death-metal (there may be others, it’s hard to tell)) began with heavy metal, the term coming into general use circa 1970 to describe a genre which had evolved since what came retrospectively to be called the proto-metal pieces of the 1950s such as Link Wray's Rumble.  As a shortened form, “metal” appears to be used properly to reference only heavy metal, presumably because it came first, the other forms almost always identified with the modifier.  The use in popular music seems to have been picked up from counterculture literature, William S Burroughs (1914-1997) using the phrase "heavy metal kid" in the 1962 novel The Soft Machine.  That was not a musical reference but in the subsequent Nova Express (1964), extended the use to a metaphor for drug use and from there, adoption in somewhere in popular culture was probably inevitable; it was the 1960s.

The lightness and heaviness of naturally occurring metals has been noted since pre-historic times, probably because of the interest in the malleability of materials which might be used to craft metal ornaments, tools and weapons and until the early nineteenth century, all known metals had relatively high densities, indeed that very quality of heaviness was thought a distinguishing characteristic which defined metals.  However, beginning in 1809, lighter metals such as sodium and potassium were isolated, their low densities demanding a definitional re-think and it was proposed they be categorised as “metalloids” but instead, that was reserved to later refer to a variety of non-metallic elements.

The term "heavy metal" seems first to have been used by German chemist Professor Leopold Gmelin (1788-1853) in an 1817 paper in which he divided the elements into non-metals, light metals, and heavy metals, based on relative density.  Later, “heavy metal” would be associated with elements with a high atomic weight or high atomic number and it is sometimes used interchangeably with the term “heavy element” although, two centuries on, there is criticism of the very usefulness of the now classical categories, the suggestion being they’ve become so diverse as to be meaningless.  Despite that, “heavy metal” in particular remains frequently used in both scientific and popular literature, the latter most often without any definitional rigor.  By comparison, presumably because their less associated with environmental pollution, “light metal” appears most often in association with metal trading, referring usually to aluminium, magnesium, beryllium, titanium and lithium.

The cosmological periodic table.  Chemists do at least agree on what metals are, heavy or otherwise.  Astronomers consider any element heavier than helium to be a metal, the distinction based on whether an element was created directly after the Big Bang (hydrogen and helium) or instead formed through subsequent nuclear reactions.  In the world of cosmology this is well understood but it can cause confusion among a general audience because it means elements such as carbon and oxygen are treated as metals, a most unfamiliar concept.

To astronomers, the production of metals is a consequence of stellar evolution.  Although metals lighter than iron are produced in the interiors of stars through nuclear fusion reactions, only a very small fraction escape (through stellar winds or thermal pulsations) to be incorporated into new stars.  For this reason, the majority of the metals found in the Universe are produced and expelled in the supernova explosions that mark the end for many stars.  This gradual processing of hydrogen and helium into heavier elements through successive generations of stars means that the metallicity of stars (the fraction of the mass of the star in the form of metals) varies.  Very old stars which formed from the almost pristine material of the Big Bang contain almost no metals, while later generations of stars can have up to 5% of their mass in the form of metals.  The percentage of metals in our star (the Sun) is around 2%, indicating it’s a later generation star.

When it comes to money, and not just with precious metals like gold, the choice of metal matters much; aluminum can become quite precious.

1950 Jaguar XK120 (chassis: 670165 (aluminum body))

Jaguar went to the 1948 London Motor Show thinking their big announcement would be the new XK engine, the twin-cam straight-six which faithfully would serve the line for the next forty-four years.  What instead stole the show was the test-bed, the roadster in which it was installed.  It was a sensation, the reaction convincing Jaguar's management to put it into production as the XK120.  However, tooling-up a production-line, even for a relatively low-volume sports car, takes time so the first 242 XK120s were hand-built with aluminum bodies affixed to an ash frame atop a steel chassis substantially shared with an existing model.  By 1950, the factory was ready for mass production and all subsequent XK120s were made with pressed-steel bodies although the doors, bonnet, and boot lid continued to use aluminum; the later cars weigh an additional 112 lb (51 kg).  All the aluminum-bodied cars were open two seaters (OTS (roadster)) and most were destined for the North American market, only fifty-eight being built with right-hand drive.  The most desirable of the XK120s, the record price for a road car at auction is US$396,000, realised in 2016.  Cars with a competition history have attracted more, a 1951 Roadster campaigned by the Scottish race team Ecurie Ecosse, sold for £707,100 in 2015 while the 1954 (steel) Competition Roadster that won its class at the Alpine Rally brought £365,500 in the same year.

1955 Mercedes-Benz 300SL (chassis: 550028 (aluminum body))

Intended for those planning to use the things in competition, the aluminum body for the 300SL gullwing was a regular production option, albeit a not inexpensive one although, given the processes required, it may have been a bargain.  Reducing weight by 215 lb (80 kg), the aluminum bodies were hand-crafted in the motorsports department in Untertürkheim and then mounted on the spaceframes sent from the Sindelfingen factory.  Of the 1400 gullwings, only 29 were built in aluminum, 26 of 855 in 1955 and 3 of 308 in 1956 so the option was taken-up only by two percent of customers.

Lindsay Lohan with metallic bags, London, 2014.

Adding to the desirability of the lightweights are the other modifications the factory made to improve competitiveness against the mostly British and Italian opposition.  Plexiglass windows, vented brake drums and stiffer springs were in the package, along with the Sonderteile (special parts (NSL)) engine with tweaked fuel-injection and a more aggressive camshaft, gaining fifteen horsepower.  Curiously, one option intended for use in motorsport actually added a little weight: the Rudge wheels, the seconds the knock-off hubs saved in the pits said to be worth the slight increase.  Available for any gullwing, the Rudge wheels are one of the desirable features, like the fitted luggage, tool kit and factory documents, the presence and condition of which attract a premium at sale.  For some years, the record price at auction for one of these was the US$4.62 million for a 1955 model, paid in 2012 for a car which in 1980 been bought by a German collector for US$57,000.  A new mark was set in 2022 at RM Sotheby's January auction at Scottsdale's Arizona Biltmore Resort when one crossed the block for US$6,825,000.

Underwire

Underwire (pronounced uhn-der-wahyuhr)

(1) A (usually almost semi-circular) metal, plastic or composite “wire” sewn into the underside of each cup of a brassiere, used both as a structural member and shaping device.

(1) A brassiere (or related component in a swimsuit or some other garment) with such wires.

A portmanteau word, the construct being under + wire.  Under is from the Middle English under, from the Old English under, from the  Proto-Germanic under (source also of the Old Frisian under, the German unter, the Old High German untar, the Dutch onder, the Old Norse undir, the Gothic undar and the Danish & Norwegian under), from a blend of the primitive Indo-European n̥dhér (under) and n̥tér (inside).  It was akin to the Old High German untar (under), the Sanskrit अन्तर् (antar) (within) and the Latin infrā (below, beneath) & inter (between, among), influencing also the Sanskrit adhah (below), the Avestan athara- (lower) and the Latin infernus (lower).  The Old English under was a preposition in the sense of "beneath, among, before, in the presence of, in subjection to, under the rule of, by means of and also an adverb in the sense of "beneath, below, underneath," expressing position with reference to that which is above, usage gained from the Proto-Germanic under-.

Under proved as productive a prefix in Old English as had in German and Scandinavian languages, often forming words modeled on Latin ones using “sub-“ and the notion of "inferior in rank, position etc" existed in the Old English and persists in the language of the titles in the UK’s civil service to this day (eg under-secretary).  The idea of it being used as descriptor of standards (less than in age, price, value etc” emerged in the late fourteenth century whereas, as an adjective meaning “lower in position; lower in rank or degree” was known as early as the 1200s.  Mysteriously, the use in Old English as a preposition meaning "between, among," as in “under these circumstances” may be a wholly separate root (eg understand).  The phrase “under the weather (indisposed; unwell) is from 1810.  Under the table was used from 1913 in the sense of "very drunk" and it wasn’t until the 1940s (possibly influenced by the onset of rationing and the consequence emergence of black markets) it came to enjoy the sense of something "illegal" (although the long-extinct “under-board: (dishonest) is attested from circa 1600.  To keep something under the hat (secret) is from 1885 and use seems not to have been affected by the post 1945 decline in hat-wearing; to have something under (one's) nose (in plain sight) is from 1540s; to speak under (one's) breath (in a low voice) dates from 1832.

Wire is from the Middle English wir & wyr (metal drawn out into a fine thread), from the Old English wīr (wire, metal thread, wire-ornament), from the Proto-Germanic wira- & wīraz (wire), from the primitive Indo-European wehiros (a twist, thread, cord, wire), from wei & wehiy- (to turn, twist, weave, plait).  The Proto-Germanic wira- & wīraz were the source also of the Old Norse viravirka (filigree work=), the Swedish vira (to twist) and the Old High German wiara (fine gold work).  A wire as marking the finish line of a racecourse is attested from 1883; hence the figurative down to the wire.  Wire-puller in the political sense dates from 1839, an invention of American English (though used first to describe matters in the UK’s House of Commons), based on the image of pulling the wires that work a puppet; the phrase “pulling the strings” replaced “pulling the wires” late in the nineteenth century.

Casting a practiced eye: Lindsay Lohan assessing the underwires.

In the technical sense familiar to a structural engineer, the bra’s underwire is a specific instance of the earlier verb (1520s) “undergird”, the construct being under + gird.  Gird (to bind with a flexible rope or cord; to encircle with, or as if with a belt) was from the Middle English girden, gerden & gürden, from the Old English gyrdan (to put a belt around, to put a girdle around), from the Proto-Germanic gurdijaną (to gird), from the primitive Indo-European gherdh.  It was cognate with the West Frisian gurdzje & girdzje, the Dutch gorden, the German gürten, the Swedish gjorda, the Icelandic gyrða and the Albanian ngërthej (to tie together by weaving, to bind).  The related forms were undergirded & undergirding.

As a familiar mass-manufactured commodity item, the bra is a relatively new innovation although many of the various functionalities afforded to the wearer are noted in illustrations and surviving garments worn since antiquity, interest in the physics of gravity long pre-dating Newtonian mechanics.  The most obvious immediate ancestor, the corset, began to be widely worn by the late 1400s, the shaping and structure of many underpinned by struts made either of metal or, more commonly, animal bone, a method of construction which, in simplified form, would later return as the underwire.  The first patent issued for a recognizably modern bra was issued in New York in 1893 for a “breast supporter” and it included all the features familiar in the mass-produced modern product: separated cups atop a metal support system, located with a combination of shoulder straps and a back-band fastened by hook and eye closures.  On the basis of the documents supplied with the patent application, the design objective was for something not only functional and practical but, unlike the often intimidating corsets then in use, also comfortable.

It was an immediate success although, lacking the capacity to manufacture at scale and unwilling to become involved in the capital raising which that would have demanded, the inventor sold her patent to the Warner Brothers Corset Company for US$1500 (at a time when a new Ford car cost around US$400).  Warner Brothers Corset Company (later Warnaco Group, in 2012 acquired by Phillips-Van Heusen Corporation (PVH), which over the life of the patent is estimated to have booked profits of almost US$40 million from its bra sales, got a bargain.  English borrowed the word brassiere from the French brassière, from the Old French braciere (which was originally a lining fitted inside armor which protected the arm, only later becoming a garment), from the Old French brace (arm) although by then it described a chemise (a kind of undershirt) but in the US, brassiere was used from 1893 when the first bras were advertised and from there, use spread.  The three syllables were just too much to survive the onslaught of modernity and the truncated “bra” soon prevailed, being the standard form throughout the English-speaking world by the early 1930s.  Curiously, in French, a bra is a soutien-gorge which translates literally and rather un-romantically as "throat-supporter" although "chest uplifter" is a better translation.  The etymological origin of the modern "bra" lying in a single garment is the reason one buys "a bra" in the same department store from which one might purchase "a pair" of sunglasses or shoes. 

The booming popularity of the bra in the 1920s and 1930s encouraged innovation and not a few gimmicks and it was in this era that manufacturers first began to develop systems of cup sizes although there was there no standardization of dimensions and, technically, that’s still the case with remarkable variations between manufacturers; it’s an industry crying out for an ISO.  It was in 1931 a patent was issued for what was described as a bra with a pair of integrated “open-ended wire loops”, semi-circular pieces of metal enclosed in protective fabric which partially encircled each breast, sitting against the chest-wall at the bottom of the breasts.  This is the origin of the modern underwire and during the 1930s, while designers would develop more elaborate versions, the concept didn’t change and as late as 1940, the underwire bra remained something of niche product being, at this stage of development, both more expensive and often less comfortable.  Wartime necessity also imposed an evolutionary delay, the use of metal during wartime being limited to essential production and carefully rationed.  Bras by then probably had become essential but apparently not underwired bras.

Hughes H-4 Hercules (Spruce Goose) on its only test flight, 2 November 1947, Long Beach, Los Angeles Harbor.  It flew for abou1 1 mile (1.6 km) and achieved a maximum speed of 135 mph (217 km/h).

Howard Hughes (1905—1976), the industrialist knew about the wartime limits on the use of metals because the War Production Board had insisted his H-4 Hercules, a huge, eight-engined flying boat designed to transport 750 troops across the Atlantic, be built using “non-strategic materials" which precluded the industry’s preferred aluminum, Hughes using birch wood almost exclusively.  The H-4, which wasn’t completed until after the end of hostilities flew, briefly, only once and was nicknamed the Spruce Goose, which obviously was arboreally inaccurate but thinking of something as funny and rhyming with “birch” wasn’t easy.  So, in 1942 Hughes knew he’d never get approval for enough metal for his big flying boat, but in 1941, before the entry of the US into the war, more than enough metal was available to create a specialized part to be used in another of his ventures: film director.

Jane Russell, promotional picture for The Outlaw (1941).

In 1941, while filming The Outlaw, Hughes wasn’t satisfied with what sympathetic lighting, camera angles and provocative posing could make of Jane Russell's (1921—2011) bust.  A skilled engineer, he quickly designed and had fabricated a kind of cantilevered underwire bra to lend the emphasis he though her figure deserved.  What Hughes did was add curved steel rods which functioned as actual structural members, sewn into the bra under each cup and connected to the shoulder straps, an arrangement which simultaneously pushed upwards the breasts and allowed the shoulder straps to be re-positioned, exposing to the camera much more skin.  In engineering terms, it was a device which achieved a fixture with no visible means of support.  Hughes was delighted with the result and completed filming though it wasn’t until much later Ms Russell revealed the cantilevered device was so uncomfortable she wore it for only a few minutes, reverting to her own bra which, to please Hughes, she modified with those trusty standbys, padding and a judicious tightening of the straps.  The result was much the same and Ms Russell waspishly added that the engineering prowess which had served Hughes well in aviation didn’t translate well to designing comfortable underwear.  The Outlaw was completed in February 1941 but, because of the focus on Ms Russell's breasts, faced opposition in obtaining the required certificate of release from the Motion Picture Producers and Distributors of America (the MPPDA which administered the Hays Code) which was demanding cuts to thirty seconds odd of offending footage.  Hughes reluctantly complied and there was a brief showing in 1943 but the film’s distributer, unwilling to be dragged into any controversy, withdrew from the project and it wasn’t until 1946 there was finally a general release on cinema screens.  Given the pent-up demand, it was a commercial success but the critics were at the time unimpressed and it only later gained a cult following, at least partly on the basis of the gay undertone in the plot-line.

Lindsay Lohan in underwired demi-cup bra, photoshoot by Terry Richardson (b 1965) for Love Magazine, 2012.  The "demi-cup look" can be achieved by choosing a bra with the correct band size and a smaller cup.  Someone who usually wears a full-cup 32D would use a 32C or even 32B to get the effect although, given the variation in cup shapes between manufacturers, some experimentation will likely be required and fitters caution this should be done in a physical store rather than shopping on-line. 

Underwires essentially fulfill part of the function of an exoskeleton in that, being designed to fit snugly against the ribcage, they provide a basic mechanism of location which means the back-strap, cups and shoulder-straps can provide the shape and support without having to compensate for excessive movement or changes in weight distribution.  The mathematics of structural engineering is really that of making push equal pull and what a well-designed (and properly fitted) underwire does is minimize the risk of movement in an unwanted direction (down) so the least energy is required to maintain the desired movement (up).  There are other ways of achieving this but such constructions typically are much bulkier and use often stiff, unaccommodating fabrics and thick straps.  The underwire is a simple technology which, in the abstract really can’t be improved upon although there are problems.  Washing machine service technicians note the frequency with which errant underwires end up in the mechanism and, being metal, damage can result.  For this reason, most bra manufacturers recommend they be placed in a sealed bag for washing.  Detachment can also happen while in use, a protruding underwire sometimes passing through the material in which its supposed to remain enclosed, giving the wearer a painful jab in a soft, fleshy spot.  Although the tips are usually plastic coated, repeated jabbing is still uncomfortable.  Being traditionally made of metal (usually stainless steel) brings it's own issues, most obviously with metal detectors but for frequent flyers, bras with plastic underwires (and hooks & clasps) are available off the shelf and plastic underwires are even sold as stand-alone part-numbers to modify existing models or for use by the small but devoted class of users who make their own.

Not all underwires are created equal: The Lingerie Addict explains.

Bra underwires typically are made from a non-ferrous metal (inside a plush casing surrounding the cup) such as stainless steel although there are some fabricated from some form of plastic which had appeal for frequent flyers not wanting to trigger the metal detectors at airports and a perhaps unanticipated market sector was among lawyers visiting prisons.  Although they might be presumed to achieve their structural effect by virtue of their rigidity, underwires actually have in them a very slight “spring” so they will splay just a fraction of an inch as the bra moves, something which enhances comfort and fit.  In that sense, an underwire can be thought of as a “torsion bar” which essentially is an unwound spring stretched straight.  The underwire has two functions: (1) to provide the superstructure with a secure location against the ribcage and (2) to distribute forces (downward, upward & lateral) in the same way the cables on a suspension bridge (which connect the towers to the deck) transfer the downward force from traffic up the cables to the towers, diffusing and distributing the stresses to the strongest point.  In a bridge, that’s the tower which, being anchored to the earth, means the forces end up moving from the structure to the ground while in a bra, they’re absorbed partially by the frame (mostly the band if well-designed and also to the shoulder straps if not) and partially by the wearer’s ribcage.  Manufacturers also use the comparison with bridges to illustrate the inherent limitation (at least when dealing with mass above a certain point) of wire-free construction.  Usually, they compare the wire-free design with a simple “rope bridge”, anchored on each side of the waterway or gap crossed but which sinks down as weight (which manifests as downward pressure) is applied.  The physics of this is that because there is no rigid support infrastructure to transfer the downward pressure away from the deck, there’s a direct relationship between the downward pressure and the sag of the deck.  For that reason, it’s important to distinguish between wire-free bras which are little more than an underwire bra without an underwire and those using a design which emulates what an underwire does, usually with a layered array of thicker, stiffer materials in the band and the lower parts of the cup.  In theory such an approach can achieve the same level of support as the most formidable underwire bra but the level of rigidity in the structure would likely render such a creation too uncomfortable to be tolerated by most although variations of the idea are used in short-duration sports such as boxing.

Playtex 18Hour (4745) wire-free bra (left) and 1996 Dodge Viper RT/10 fitted with car bra.  Car bras are also wire-free. 

Although common, not all bras use an underwire, the “wire-free” design used for a number of reasons.  For those with small breasts who require something merely decorative or desire only coverage rather than support, the wire-free bras are a popular choice and the majority of sports bras also use other methods of construction.  Like just about any form of engineering, there are trade-offs, the advantages gained in not using an underwire needing to be assessed by wearers considering whether they outweigh whatever limitations may be imposed.  Sometimes, the wire-free devices are marketed as a niche product such as maternity, nursing, post surgical or nightwear (ie for sleeping in, it really does seem a thing).  However, modern materials and forms of reinforcing do make the wire-free bra a viable choice for a wide range of wearers although the physical dimensions of the fabric do tend to be greater (the frame, straps etc), the principle much the same as when aluminium is used for an engine block rather than cast iron, the volume of the lighter material needed to be greater to compensate for its reduced strength.  In a sign of the times, although historically bras without an underwire often were advertised as “wireless”, the ubiquity of the word to describe various forms of digital connectivity (over WiFi, Bluetooth etc) means the industry had shifted mostly to calling them “wire-free” which may seem unnecessary given few would confuse a bra with a router but the internet-enabled bra can be only a matter of time so it’s good manufacturers are thinking ahead.  IT nerds actually already have proved they can deal with linguistic overlap and know about BRAS (broadband remote access server, known also as BBRAS or B-RAS), a device which routes traffic to and from devices such as DSLAMs (digital subscriber line access multiplexer) on an ISP’s (Internet Service Provider).

1989 Porsche 911 Silver Anniversary with car bra and mirror bras.

The Silver Anniversary edition was released in 1989 to mark the 25^th year of 911 production, a run of 500 (300 coupés & 200 cabriolets) made available for the US market.  Available only in silver metallic paint or satin black metallic, all were trimmed in silk grey leather with black accent piping & silk grey velour carpeting.  In the usually way these things are done, the package included a bundle of options including a stitched leather console with an outside temperature gauge and a CD or cassette holder, a limited-slip differential, a short shifting gear lever and the inevitable “25^th Anniversary Special Edition” badges, stamped in bronze.

The other wire-free bras are “car bras” (hyphenated and not).  Car bras are “protective garments”, vinyl covers designed to fit snugly over the front of a vehicle, stopping stones or other debris chipping the paint.  Their origin appears to line in the “cover masks” used by car-manufacturers in the 1970s as a means of concealing the appearance of vehicles being tested (a “shake-down” the preferred phrase) on closed tracks or public roads prior to their release and the purpose was to stop photographers getting pictures of upcoming models to sell to magazines, anxious to scoop the competition with news of what would soon be in the showrooms.  The practical advantages however were obvious and in the 1980s when chrome plated bumpers began rapidly to disappear and be replaced by painted surfaces, stone chips became more of an issue, the vulnerable frontal area in many cases more than tripled.

Wire-free: Covercraft's "Lebra" car bra for 2010-2013 Chevrolet Camaro.

The early implementations of the car bra were utilitarian but those who were (1) obsessive about such things, (2) drove frequently on roads where stone damage was more common or (3) owned a vehicle with a design which made such damage more likely (the Porsche 911 a classic example) were soon able to buy vinyl (nearly always black) covers which came to be called “car bras”.  In the 1980s they were very popular and the better ones were both easy to fit and fitted well but problems were soon observed, notably the trapping of moisture which, in conjunction with dust or tiny fragments of stone which tended to be caught around the edges, acted as a kind of sandpaper as the vinyl moved slightly while the vehicle was in motion; over time, this could damage the paint, the very thing the car bra was there to prevent.  As women wearing bras understand, chafing can be a problem.  For that reason, car bras fell from favour, especially as paint technology improved and finishes became more durable and less susceptible to being chipped.  Additionally, clear protective coatings became available which offered “extra layers” which were undetectable by the naked eye and by the time adhesive “wraps” (opportunistically now also marketed as "clear bras") in just about any color became a thing, the appeal of the car bra diminished although they remain available and the newer versions have been revised to reduce "chafing".  However, unlike other symbols of the 1980s (leg-warmers, shoulder pads et al), a revival of the fashion seems unlikely.  Car bras don’t use an underwire but some of the advertising does have something in common with the underwear business, one manufacturer listing some of the features of their car bra as including (1) double padding to prevent wear-thru, (2) a top double-stitch for better body-hugging fit and (3) double-covered & reinforced hooks which won’t scratch.  The available materials include both the basic vinyl and “textured carbon fibre vinyl”.

Copper

Copper (pronounced kop-er)

(1) A malleable, ductile, metallic element having a characteristic reddish-brown color, occurring as the free metal, copper glance, and copper pyrites: used as an electrical and thermal conductor and in such alloys as brass and bronze.

(2) As a color, a metallic, reddish brown.

(3) A slang term for a coin (usually of a smaller denomination) composed of copper, bronze etc.

(4) A slang term for a hedge (archaic).

(5) A slang term for a police or other law-enforcement officer, now usually as the shortened “cop”.

(6) In lepidopterology, any of several butterflies of the family Lycaenidae, as Lycaena hypophleas (American copper), having copper-colored wings spotted and edged with black.

(7) In slang and informal use, a tool or any of the various specialized items made from copper, where the use of copper is either traditional or vital to the function of the item.

(8) In historic UK & Commonwealth use, a large kettle (now usually made of cast iron), used for cooking or to boil the laundry (archaic and functionally extinct); a once popular term for any container made of copper.

(9) To cover, coat, or sheathe with copper.

Pre 1000: From the Middle English coper & copper, from the Old English coper & copor, from the Late Latin cuprum (copper), from the Latin aes Cyprium (literally “Cyprian brass” (ie metal from the island of Cyprus)), from the Ancient Greek Κύπρος (Kúpros) (Cyprus).  It was cognate with the Dutch koper (copper), the Old Norse koparr (copper), the German Kupfer (copper) and the Icelandic kopar (copper).  The alternative spelling coper (a hangover from the Middle English) is obsolete.  Copper & are nouns, verbs & adjectives, copperas is a noun, coppered & coppering are verbs & adjectives and coppery, cupric, cupreous & cuprous are adjectives; the noun plural is coppers.

In the Ancient Greek there was khalkos (ore, copper, bronze), a direct borrowing of the primitive Indo-European word meaning "ore, copper, bronze" and familiar in the Sanskrit ayah and the Latin aes.  In Classical Latin aes originally was used of copper but as technology evolved, this was extended to bronze (its alloy with tin) and because bronze was used much more than pure copper, the word's primary sense shifted to the alloy and a new word evolved for "copper," from the Latin form of the name of the island of Cyprus, where the copper mines were located.  Cyprus being the birthplace of Aphrodite (Venus), this led (in the way mythology adapted to the times) to the association of by alchemists of Aphrodite with copper.  Aes passed into the proto-Germanic where originally no linguistic distinction existed between copper from its alloys while in English it became “ore”.  In Latin vernacular, aes was used also to mean “cash, coin, debt, wages” in many figurative expressions. The chemical symbol Cu is from cuprum, from the Ancient Greek Κύπρος (Kúpros) (Cyprus).

The use to describe coins made of (or appearing to be made of) copper dates from the 1580s while to refer to vessels (jars, tubs, pots etc) made from the metal it came into use in the 1660s, the adjective cupreous (consisting of or containing copper (from the Late Latin cupreus (of copper), from cuprum (an, alternative form of cyprum (copper)) emerging in parallel.   The adjectival use in the sense of “made from or resembling copper” emerged in the 1570, a development from the verb, in use since the 1520s.  The alloy copper-nickel was first used to mint coins in 1728.  The trade of coppersmithing, practiced by the coppersmith (artisan who works in copper), was a creation of the early fourteenth century and was, as was practice at the time, soon used as a surname.  The noun copperplate (also copper-plate) described a "plate of polished copper, engraved and etched" dates from the 1660s and was later used figuratively to describe designs (wallpaper, woodcuts, carvings, carpet etc) with some resemblance to the styled metal.  Perhaps surprisingly, the adjectival sense in the sense of an allusion to the reddish-brown color isn’t documented until the turn of the nineteenth century (“cupric” used thus in 1799 and "copper-colored" after 1804) although it may earlier have been part of one or more oral traditions.

Symbol: Cu.
Atomic number: 29.
Atomic weight: 63.546.
Valency: 1 or 2.
Relative density: 8.96.
Specific gravity: 8.92 at 20°C.
Melting point: 1084.87±+0.2°C.
Boiling point: 2563°C

In an example of the way English must seem strange to speakers of more apparently logically languages, the use of “cop” as a slang term for “police or other law-enforcement officer” is a shortening of “copper” but that is etymologically unrelated to the metal, the use of “copper” to describe policemen (at a time all were men” derived from the English “cop”.  The construct was cop (to take, capture, seize) +‎ -er (the agent suffix).  Cop is of uncertain origin but the most likely link is with the Middle English coppen & copen, from the Old English copian (to plunder; pillage; steal) although some etymologists have also suggested the Middle French caper (to capture), from the Latin capiō (to seize, grasp) or the Dutch kapen (to seize, hijack), from the Old Frisian kāpia (to buy), source of the Saterland Frisian koopje and the North Frisian koope.  A perhaps related form was the Middle English copen (to buy), from the Middle Dutch copen.

New York's Statute of Liberty with the copper skin colored as it would have appeared in France, prior to being shipped to the US for erection in  in 1886 (left) and as it appeared decades later, the metal showing the effects of oxidization (right).  

The expression “to cop” was thus used in the sense of “to steal” but also (as a transitive verb) “to (be forced to) take; to receive; to shoulder; to bear, especially blame or punishment for a particular instance of wrongdoing”, hence the expressed notions of “cop the blame”, “cop an injury” etc.  It was the association with crime and violence which in the nineteenth century saw "copper" (one who cops (apprehends) the criminal) adopted in the UK (first documented in 1846) to describe what were then the still relatively novel (in the sense of a structured, publicly-funded force) policemen and as “cop”, the world spread world-wide.  Cop also had a mono-syllabic appeal to many sub-cultures who took up the sense of “to obtain; acquire; purchase”; it was used (1) by drug users to express acquisition of narcotics, (2) among anoraks (train-spotters, plane-spotters, bird-watchers etc) to mark the observation and recording of something unique or at least rare and (3) by those living off immoral earnings (pimps), to speak of the recruitment of a prostitute to the lineup.  There was also the alleged slang form “fair cop”, said to be used by criminals (to cops) when admitting guilt although whether this was as common in real life as it was in the imaginations of crime writers isn’t known although “bent copper” (a corrupt police officer) still enjoys some currency.

JTC Roofing in the UK provided a chart using the Statute of Liberty to illustrate the natural process by which copper gradually changes in color from the original reddish-brown to green, a chemical reaction between the metal and the oxygen in the atmosphere, something known as oxidation.  In an aesthetic sense, the transition to green is part of copper’s charming patina but it’s also functional, providing a protective coating which protects surface deterioration and in this it differs from a ferrous metal like iron which, under oxidation, becomes rusted, the rust eating into the material.  The result can be seen in the light bluish-green copper facades which adorn many copper rooftops and structures and the pallette evolves over years before the familiar green tint achieves a final hue, something influenced also by atmospheric and climatic conditions.

The patination of copper induced by oxidation can be emulated in hair colors: Lindsay Lohan demonstrates. 

Helpfully, World of Chemicals has explained the chemistry.  When in 1886 the Statute of Liberty was assembled and erected after being shipped from France, it was a quite dull brown, reflecting the process of oxidation which had already taken from the metal the shininess which the coppersmiths and engineers would have seen when first working on the pates in Paris and it would take another 30-odd years of weathering before the now familiar color settled.  This patination is fine if a structure for decades remains untouched but in some uses in architecture (especially roofs which are vulnerable to damage), it’s sometimes necessary to replace copper panels which can result in an unsightly patchwork of colors.  For this reason, the industry has developed processes of pre-patination which can render copper panels with specific degrees of patination to match a sample of the damaged item, thus providing a close color-match.

Because of its location and the era in which it has stood, the particular path to verdigris (from the French vert-de-gris (literally “green of Greece”)) assumed by the Statute of Liberty was influenced by the unique environmental conditions.  Although the process is linguistically encapsulated as “oxidation”, it's not a simple single reaction between copper and oxygen because the generated green oxide continues to react to make copper carbonates, copper sulphide, and copper sulphate.  Initially, the copper reacts with oxygen from the air in a redox reaction, the metal donating electrons to oxygen, which oxidises the copper and reduces the oxygen, the copper oxide continuing to react with oxygen to form copper oxide.  However, for many of the decades in which the statute stood, the atmosphere contained much sulphur from the burning of coal and this induced another reaction which produced copper sulphide (black) which reacts with atmospheric carbon dioxide and hydroxide ions from water vapour, forming three compounds all of which exist in shades of blue or green.  The speed at which the patina develops and evolution of the colour depends on factors like temperature, humidity and air pollution, not just the presence of oxygen and carbon dioxide and, in another time, in another place, things would have unfolded differently.

Statue of Liberty (1962), silkscreen print by Andy Warhol. 

Andy Warhol (1928-1987) produced a few depictions of the Statute of Liberty, mostly variations of the familiar theme made famous by his prints of Marilyn Monroe (1926–1962) but one with a touch of something original was a silkscreen rendering in 1962 of multiple tiled images in 3D.  At auction by Christies (New York) in 2012, it sold for US$43.8 million, part of a collection of contemporary art that realized an encouraging US$412.3 million, regarded at the time as a sign the market was recovering from the shock of the global financial crisis (GFC); the US Federal Reserve (The Fed) must have been pleased to see all that quantitative easing being spent wisely.  Even so, it didn’t set a record for a Warhol, Eight Elvises sold in a private sale 2008 for a reputed US$100 million although the auction house did throw in a pair of 3D glasses with the catalogue so there was that.  In 2013, another Warhol from 1963 set a pop-art record which stands today, Silver Car Crash (Double Disaster) selling at auction for US$105.4 million.