Silver metal purity test manufacturers fujairah - Fujairah chemical https://fujairahchemical.com Bringing life to chemistry Thu, 26 Apr 2018 22:07:01 +0000 en-US hourly 1 SILVER METAL purity test https://fujairahchemical.com/product/silver-metal-purity-test/ Sat, 30 Dec 2017 19:28:50 +0000 http://fujairahchemical.com/product/silver-metal-purity-test/ Spot turns a creamy colour it is high quality silver, usually sterling. If it turns black it is coin quality silver and if it turns green it has high amounts of copper and therefore is poor quality silver and a gold colour means a lot of brass,

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Silver testing solution manufacturer and supplier.   Place a drop of acid on the object to be tested. 

90 to 100% silver, the acid will show a creamy color. 
77-90% silver, the acid turns a gray color.
65-75% silver, then the acid will show a light green color.
90 to 100% silver, the acid will show a creamy color. 
77-90% silver, the acid turns a gray color.
65-75% silver, then the acid will show a light green color.

The post SILVER METAL purity test first appeared on Fujairah chemical.

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