3PK 18K Gold Testing Acid Solutions - FRESH 12g BOTTLES w/ FREE POLISHING CLOTH

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3PK 18K Gold Testing Acid Solutions - FRESH 12g BOTTLES w/ FREE POLISHING CLOTH:
$8.58

3 BOTTLES - 18 Karat Gold Acid Testing Solution
***BONUS: Receive a FREE 5\" x 5\" Microfiber Polishing Cloth w/ order!***Color-coded white 12g bottles of test acid for 18k gold.Gold testing via acid solutions are a classic way of testing gold items for their karat values. This method is best used on scrap gold to be smelted due to the destructive nature of the testing, but can be used on gold pieces to be worn if the testing if done in aninconspicuous spot.
PLEASE NOTE: Gold testing acids are made using NITRIC ACID that can harm the skin. Please exercise caution when using this method of testing, including proper protective eye wear and gloves. Nitric Acid can burn the skin and leave stains.
Procedures for Testing GoldTo test for the karat value of gold, platinum and silver, you will need the following materials and tools:

Black acid testing stone that is washed thoroughly with water prior to each test OR a needle file
Acid
Reference Gold - Either Gold Testing Needles or Verified Gold Pieces

Testing for 10K, 12K and 14KScratch or Rub the piece onto the test stone, leaving a visible deposit of gold on the stone. Next to this position, scratch the appropriate needle (10, 12, or 14K) - if you do not have needles you can use a gold item that has a known karat value. Place a drop of the appropriate acid (same solution as the needle/gold item you have used) on the stone where the gold deposits are. If the gold is the same karat or higher, the acid will not affect the gold marks. If the gold piece is of a lower karat, the scratched deposit will dissolve and eventually disappear while the mark from the needle will stay. Fake gold and other metals will dissolve very quickly.When testing for potential gold plated items such as heavy necklaces and earrings, use a metal file to make a slight gouge in the piece. Place a drop of acid (the acid should match the karat value of the gold on the piece) onto the gouge. If the item is gold-plated, the acid will slowly dissolve the metal underneath. If the item is pure gold, no reaction should occur.By repeated trial, the karat of the gold pieces can be determined to a close approximation. 12K gold is determined using both 10K and 14K gold. By first testing with the 10K acid, you can determine that it is of a higher Karat value than 10K gold if no reaction occurs. Then, when testing with the 14K acid, the gold should begin dissolving but slowly. 14K gold will not dissolve at all, and 13K gold will have a color change a slight bubbling reaction, very slowly dissolving the gold..(Caution: Many objects are marked 14K, but were fabricated prior to 1982 when it was legal to mark items 14K, but in reality the gold was 13.5K When testing 13.5K gold the 14K solution will not dissolve the scratch, but will make it lose its brightness and will turn it into a yellow-rusty color)Testing for 18KRepeat the steps from above and apply 18K acid. Any gold that is less than 18K will disappear in less than 30 seconds. Gold that remains on the stone is 18K or higher. If any gold remains, another test should be done with 22K acid to determine 20K, 22K, or 24K gold.View more great items