Gold Test Needles-Set Of Three-10K-14K-18K Ultrasonics Supports an organized

Supports an organized

test settings on scrap material prior to production work

this sleeve is a dependable component for controlled wire-drawing work

One punch holding handle with set screw for secure punch retention

Gold Test Needles-Set Of Three-10K-14K-18K Ultrasonics Supports an organizedGold test needles are an essential tool for jewelers performing acid based karat testing. This set of three needles covers the most commonly encountered gold karats in jewelry: 10K, 14K, and 18K. Use these needles as reference standards when comparing acid reactions on a test stone to determine the karat of an unknown gold item. To use, select the appropriate karat needle and rub or scratch it against a test stone. Make a second rubbing or scratch