|Type of plating||Features||Characteristic value|
|Acidic cyanogen bath||- Hardness and smoothness are enhanced by alloying trace amounts of cobalt or nickel.
- Application to high-reliability solderable parts, such as connectors and semiconductors.
- Strike plating from a strongly acidic bath is performed in the case of plating unplatable materials, such as stainless steel.
|Hv150 - 180 (for contacts); contact resistance 0.58 – 0.62mΩ|
|Neutral cyanogen bath||Applied for decorative purposes and to semiconductor-related parts requiring bonding.||Hv60～80|
|Alkaline cyanogen bath||Decorative uses: necklaces, watches, eyeglass frames, lighting apparatus, etc.
 Pink gold (Au-Cu alloy plating)
 Green gold (Au-Ag alloy plating)
 Green white gold (Au-Ni alloy plating)
|Hv200 – 270 (for decorative purposes)|
|Mildly alkaline non-cyanogen bath||For thin gold plating|
|Electroless plating bath||Substitution type gold plating (primary nickel plating)|