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The acids will change colors based on Purity! SILVER: • 90% – 100% = DARK RED • 80% – 90% = LIGHT RED or brownish • 65% – 75% = Light Green Color The Gold Test Acid kit will change to the yellow color located on the 22K bottle based on purity! DIGIWEIGH SCALE: Ideal for weighing precious metals, this electronic balance is perfect for virtually any small item you can think of, and has been used within the home as well as by professionals. The flip-open cover protects the scale’s platform while not in use. The bright blue LCD….