Solvent

Solvent (pronounced sol-vuhnt)

(1) Able to pay all just debts; meet all financial obligations (ie not insolvent).

(2) Something with the power of dissolving.

(3) A usually liquid substance that dissolves another to form a solution.

(4) Something that solves or explains (archaic).

1620–1630:  From the Middle English solvent, from the French, from the earlier form solver.  Latin root was solventem, accusative singular of solvēns (releasing), present participle of solvō, derived from the construct se (away) +‎ luō (to untie, set free, separate), most usually as solvere (to loosen, to free).  The meaning as applied to financial debts, originally a French form, dates from the 1650s.  As a substance able to dissolve other compounds, use emerged in the 1670s.  Unfortunately, the Czech noun solvence (solvency) was never picked up by English; its adoption would have made the odd clumsy phrase more elegent.  Solvent & insolvent are nouns & adjectives and solvency & insolvency are nouns; the noun plural is solvents.

Solvents and exfoliants.

Although the end result of use should (helpfully) be similar, technically, solvents and exfoliants differ both  in composition and application.  A solvent is a substance capable of dissolving other substances, typically for the purpose of removing them from the surface to which they've become adhered although in science and industry, they're used also for dilution or extraction and in all but some specialized products, they tend to be liquids, whether used in cleaning, manufacturing or chemical processing.  The concoctions are many but the best known solvents include water, alcohol and the acetone familiar to users of nail-polish removers.  Exfoliants are best-known as the commercially packaged substances used to remove dead skin cells on the face, the hope being an improvement in the texture of the skin and thus a more glowing, youthful appearance.  Unlike solvents which dissolve stuff, exfoliants work by the mechanical-chemical process of physically scrubbing or sloughing off the outermost layer of dead skin cells and are packaged variously as scrubs with abrasive particles, brushes, loofahs, or chemical mixes such as alpha hydroxy acids (AHAs) or beta hydroxy acids (BHAs).

In praise of Orange Solv.

Orange Solv is a water-soluble solvent marketed as an alternative to the petroleum, chlorinated or glycol-ether mixtures used in heavy duty cleaning and de-greasing.  Applications include grease and tar removal from engines and parts, paint removal from solvent-resistant hard surfaces and it’s widely used commercially to remove chewing gum and stains from industrial carpets.  It’s been adopted by local governments as an additive to high-pressure water systems in the removal of graffiti and one vlogger (influenced presumably by practical experience) endorsed Orange Solve as the preferred solvent to remove the CHEATER signs spray-painted onto cars by vengeful WAGs.  Orange Solve is made from D-Limonene, an extract from the peel of oranges and lemons.  Low in toxicity, it’s pleasant to use, has minimal skin impact and is biodegradable.  Produced using the waste from the citrus industry, it's classified as non-flammable and when diluted with equal parts water, pH is a mildly alkaline 9. After use, there remains a citrus fragrance wafting about which some enjoy and others find intrusive.