Silver purity test
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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. Refer link for TESTING procedure http://rxmarine.com/SILVERMETALpuritytest