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1.Rub the item on touchstone until it leaves gold colour mark on the touchstone.
2. Pour Gold Tester Solution No. 1 on the gold colour marking. If it contains gold, the marking will remain on the stone. If the marking disappear, means it does not contains gold.
3. Then pour Gold Tester Solution No.2 on the gold colour marking, to see the fineness of gold.
• Used for gold assaying by using touchstone method.
• Please handle this solution with care. Use precautionary tools like masks and nitrile gloves when handle the solution.