Sakurabc เครื่องมือทดสอบกรด - ทองคําเงินกรดหินแพลทินัม

Features:
 
This kit is used to verify the gold content in items!
Ideal for testing jewelry coins antique gold silver platinum collectibles and more!
This solution works for testing any gold which you believe to be 10K 14K 18K 22-24K silver and platinum pure.
Acid changes color based on purity. Very easy to use.

Specification:
 
Material: High purity Graphite Stone & Acid Testing Water
Graphite Stone Size: Approx. 4.1 * 1.1 * 7.2cm / 1.61 * 0.43 * 2.83inch
Acid Testing Water Size: Approx. 3 * 1.2 * 4.7cm / 1.18 * 0.47 * 1.85inch
Total Weight: 90g
Type: Jewelry Tools & Equipments

Package List:
1 * Graphite Stone
3ml * Acid Testing Water

Note:
How to use:
If you want test your gold ring is real or not just need rub black stone and leave a small sample on stone
Apply a drop of this solution to a small sample of the item to be tested onto the test stone.
Then the real gold will stay on the touchstone false one will be dissolved or oxidized to blue
If the sample disappears then the item is below the karat of the solution.

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