Cyanide-plating baths alkaline electrolytes

Sulfite electrolytes for colored gold alloys are also in use for decorative deposition thanks to their excellent distribntion and leveling properties and also for their superior ductility compared to gold alloy deposits from acid cyanide electrolytes giving similar shades and colors [90], Alloy plating from snlflte electrolytes comprises binary and ternary compositions, such as Au-Cu, Au-Pd, and An-Cn-Pd—already reported by Rapson [3] and later incorporated into proprietary processes [91-93], The later is an alloy finish widely used in the electroplating of spectacle frames. Example formnlations of nentral and alkaline sulflte baths for the electrodeposition of gold alloy deposits are reported in Table 11.8. 

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