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Helps eliminate air bubbles from casting investment for cleaner
Final approval for legal-for-trade use depends on your state or local Weights & Measures official
4 mm at the tip and tapers to 0
Many lower-quality tungsten carbide drawplates exist on the market — verify insert thickness and polish quality before purchasing alternatives
Premium Gold Test Stone-Made in the USA 3" x 1-5/8" x 1/4" New Tools Helps eliminate air bubbles fromA professional grade gold testing stone made in the USA from natural Arkansas black novaculite, quarried and cut domestically. Used by jewelers and metalsmiths to test precious metals, this stonealso known as a streak stone or touchstoneprovides a reliable surface for acid based karat testing. Beware of cheap imitations made of glass, which stain and degrade quickly under repeated use. To test a metal item, rub or scratch it across the stone's
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