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2. Cleaning agent - Wikipedia

   en.wikipedia.org/wiki/Cleaning_agent

   Silver cleaning is a specialty since silver is noble but tends to tarnish via formation of black silver sulfide, which is removable via silver-specific complexants such as thiourea. Stainless steel, nickel, and chromium cleaners contain lactic, citric, or phosphoric acid. A solvent (mineral spirits) may be added.

3. Silver standards - Wikipedia

   en.wikipedia.org/wiki/Silver_standards

   The Scandinavian silver alloy contains 83% pure silver and 17% copper or other metals. [10] German silver will be marked with a millesimal fineness of 800 or 835 (80% or 83.5% pure silver). Any items simply marked "German silver", "nickel silver" or "Alpaca" have no silver content at all, but are mere alloys of other base metals. [citation needed]

4. Tide (brand) - Wikipedia

   en.wikipedia.org/wiki/Tide_(brand)

   Tide claimed it was "America's Washday Favorite". Authority was quickly gained in the U.S. detergent market, dwarfing the sales of Ivory Snow; and accelerating the demise of two of its main competing products, Rinso and Gold Dust Washing Powder, both then Lever Brothers brands. These other brands came in the more familiar soap-powder and soap ...

5. Gold extends record, silver jumps to 12-year high as precious ...

   www.aol.com/finance/gold-extends-record-silver...

   Gold and silver showed no sign of slowing their rise on Monday as investors continue to pour into precious metals. Gold futures touched fresh records, rising as much as 0.8% to hover near highs of ...

6. Silver compounds - Wikipedia

   en.wikipedia.org/wiki/Silver_compounds

   Some silver oxide powder.. Silver is a relatively unreactive metal, although it can form several compounds. The common oxidation states of silver are (in order of commonness): +1 (the most stable state; for example, silver nitrate, AgNO 3); +2 (highly oxidising; for example, silver(II) fluoride, AgF 2); and even very rarely +3 (extreme oxidising; for example, potassium tetrafluoroargentate(III ...

7. Silver sulfide - Wikipedia

   en.wikipedia.org/wiki/Silver_sulfide

   Silver sulfide is an inorganic compound with the formula Ag 2 S. A dense black solid, it is the only sulfide of silver. It is useful as a photosensitizer in photography. It constitutes the tarnish that forms over time on silverware and other silver objects. Silver sulfide is insoluble in most solvents, but is degraded by strong acids. Silver ...