Silver purity test

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
Product: 
SILVER METAL purity test
Silver Nitrate (Solid / Crystal) AR
Silver Nitrate 2% Soln 500 ml Btl
Silver Nitrate 5% Soln 500 ml Btl
Sodium Bromate
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