Gold Plating Services’ ECO 24K Pure Gold Plating Solution operates at a high cathode efficiency producing a pure gold deposit which meets ASTM B488. This cyanide free, sulfite gold complex solution produces a lustrous to bright gold deposit with relatively low internal stress. This type of high purity, (99.99% gold purity), deposit is typically used in the medical, semi-conductor, electronic, and PWB industries where soft, high purity gold is required. Note: Due to the grain structure of this type of gold deposit the reflective qualities of the surface will become noticeably “matt” with increased thickness.

Gold Content -          0.25 – 1.5 Troy oz. per gallon, as per customer specification
Purity -                      99.99+ percent gold minimum (24 karat)
Hardness                   Knoop hardness < 90 (typically 55-60)


Operating Conditions


Temperature                                                     45° - 60° C (115° – 140° F)

Anode to Cathode Ratio                                   1:1 (or higher)

Specific Gravity                                                 9 – 28 Be

PH (electrometric)                                             8.5 – 10.5 (optimum 9.5)

Time to deposit 0.0001’’ (2.5 micron)               13 minutes at 3 ASF (depending on conditions)

Efficiency                                                          95 - 120-mg/ampere minute

Filtration                                                            Continuous

Hardness                                                          60 – 80 Knoop

Current Density                                                3 amperes per square foot, (20 ma/in2 )

Anode                                                               Platinized titanium (preferred), or Type 316 stainless steel

Agitation                                                           Moderate relative Cathode to solution movement


To insure consistency of deposit, the following operating conditions should be controlled;

METAL CONTENT, maintain within 20% of specified operating conditions.
TEMPERATURE, maintain within 5% of specified operating conditions.
PH, maintain within 5% of specified operating conditions.
CURRENT DENSITY, Maintain within 5% operating conditions.