“The acid test” is the traditional method of testing gold: if the gold is the same karat as or higher than the test acid, it will not react. If it does react, it is of a lesser karat than the test acid. The needles included in the test kits provide a standard for comparison. The acids are easily dispensed from plastic squeeze bottles
Available in 10k, 14k, 18k, 22k, Silver and Platinum.
Metals that test for higher than 18K should be tested with 22K & Platinum acid!! If the streak remains on the test area above 22k, it is probably STAINLESS STEEL or Platinum. We also recommend you use a rare earth magnet when testing as some steel jewelry is magnetic.