JSP & GTE Boric Acid Powder – 99.9% Pure, Gold Refining & Jewelry Casting, 8–16 oz

JSP & GTE Boric Acid – The Trusted Standard for Gold Refining and Jewelry Casting Professionals across the refining and jewelry industries trust JSP and GTE for reliable, high-purity chemicals—and this 99.9% pure anhydrous boric acid powder is no exception. Packaged in a durable 8 oz bag or 1lb bag , it's ideal for refining gold and silver, fluxing during melts, and protecting tools from oxidation. 🔥 Perfect for: Gold & Silver Refining: Removes oxides and impurities, forming a clean slag for higher yield. Jewelry Soldering: Mixed with alcohol and burned off, it shields metals from oxidation during torch work. Tool Coating: Prolongs tool life by creating a protective barrier on crucibles and other equipment. ⚙️ Also used in: Steel hardening Flame retardant applications pH buffering for pools and labs DIY chemistry and lab experimentation Product Details: Brand: JSP or GTE (you choose) Grade: 99.9% Pure Industrial / Anhydrous Form: Fine Powder Net Weight: 8 oz or 1lb bag (You choose) Packaging: JSP Clear zip bag or GTE black Mylar resealable labeled bag 📦 Ships UPS Ground (USA only) ⚠️ Handle with care. Use PPE and ventilated space when refining. New to gold refining? Visit our Gold Refining Learning Center for beginner-friendly guides that explain the basics of gold recovery, refining concepts, common materials found in electronics, and how precious metals are identified and evaluated. These guides are designed to help you better understand refining processes and the tools commonly used in precious metal work. Explore the Learning Center HERE