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FRIDAY : 9H30 - 13H00




Testing Solutions - Bottle 20ml




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Availability: In stock.

Code Price Qty
Kontrastol ( product to make the touch stone more black again
Stainless steel
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Product Description

How to use:

1)Rasp the metal piece on the surface to distinguish plating from solid gold.

2) Rub the metal on the filed area against the touchstone. The downstroke is supposed to be sharp and clear.

3) Apply the testing solutions to the downstroke.Start with the acid for 8ct and go up to 18 or 21,6ct:

Acid 8 carat affect metals under 8 carat

Acid 14 carat affect metals under 14 carat

Acid 18 carat affect metals under 18 carat,etc.

If the metal will be affected by an acid the solution will start foaming and the metal composition is under the shown level on the test solution.

4)Optional:Control your result and countercheck your finding with the testing star. (to buy separatly) Therefore make an additional downstroke with the matching gold composition of the testing star. Apply the testing solution on both downstrokes and compare the results for final conclusion.

5)Clean the touch stone after use with water carefully.Then apply Contrastol with a cloth on the stone.

Silver compositions will be tested in the same way. The testing solution for silver is based on standard 800.

The stainless steel test is used to distinguish stainless steel, silver and White gold.The test solution needed about 1 minute. After one minute the drop can be removed. Whitening means the item is made of stainless steel, a darkening the item is made of silver.

The PLATINIUM testing acid comes in a handy 20 ml bottle and allows easy testing for Platinum: Rub the metal piece  on a test stone and apply a drop of acid.

If the piece of jewelry to be tested is made from Platinum 999,5, the testing line will still be visible after 2 or 3 minutes - even after wiping the jewelry with a cloth.

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