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The following precious metal electrolytes are the most important ones:
*'''Gold electrolytes''' For functional and decorative purposes pure gold, hard gold, low-karatgold, or colored gold coatings are deposited. Depending on therequirements, acidic, neutral, or cyanide electrolytes based onpotassium gold cyanide or cyanide free and neutral electrolytes basedon gold sulfite complexes are used.