| | |  | Acid Test Stone | Home » » » » Test Kit Gold 10K 14K 18K 22K Silver Plat & Stone 8Pc | | | | | | | Description: | | 8 New Precious Metal Tools 6 Testing Solutions. This is a new set of 6 testing solutions. Everything you need to appraise 10k, 14k, 18k, 22k and silver. These are the finest acids made today. Each bottle has 1/2 fl oz of acid. The sturdy plastic bottles maximize safety and allows the user to easily squeeze out one drop at a time. You receive: One bottle of 10k testing acid. One bottle of 14k testing acid. One bottle of 18k testing acid. One bottle of 22k testing acid. One bottle of silver testing acid. One bottle of platinum testing acid. Acid Test Stone. This is a new acid testing stone. This stone is used to test 10k, 14k, 18k and silver. Use this stone with acid solutions. It measures approximately 1 7/8" x 1 7/8" x 3/16" (47 x 47 x 5 mm). Acid Test Needles. This is a new set of testing needles. These needles test 10K, 14K, 18K gold and silver. These are used to determine karat content of gold and silver. The needles and the item to be tested are rubbed on a test stone and treated with acid to determine a match. | | | Product Details: | | | Average Customer Rating:
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| | | | Customer Reviews: | |
Average Customer Review:
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7 of 7 found the following review helpful:
Works well.Nov 02, 2010
By Jann
It took forever to receive however it works very well and is definately a fresh batch. I have never used needles before but decided to try them as sometimes there is a question about a piece and they could help with a second opinion.
Excellent Starter Kit for Acid base Gold TestingMay 14, 2012
By ShreveCC
If your testing precious metals; this is the set to own. The stone is of higher-end quality, however the stone is rather small for testing batches of metals. This is a minor issue though- quality is what you need. The gold needles are a must have- why? - to narrow down the (K)arat grade of gold. Yes, the needles are real gold tipped, and they do wear out after a while in use. Use the needles only if narrowing down Karat grade is of the greatest importance in your testing. A needle set costs for obvious reasons.
This is personal testing advice and a review for this product - all legal, physical, and personal liability rests on YOU.
How to use the gold needles for a "judgement based" assay of Karat:
1. Scratch your test gold item on one side of the stone, narrow down the grade by the normal process of using acids- match K acid to item, or use acids from lower K to higher K, but only if the item doesn't have an assay mark to Karat.
2. Now that you have an idea of Karat grade on the test item, scratch the higher K and\or lower K grade tips of your needles on the stone.
3. Apply the matching Karat acid to the Karat scratches made by the needles on the stone.
4. Compare the scratch marks by the test item on the stone to the scratch mark(s) made by the needles. Does the "14K" of the test item look more like the 18K needle scratch? It could be 14K-17K. Did the 14K look more like the 10K needle scratch? It could be 8K-13.5K
5. When undecided - cut deep with a file or break the test item and apply the correct Karat acid directly on the test item in question. It could be heavy plated and or gold "covered" to fool an acid based gold testing person.
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