This additive is a blue liquid. The golden color produced by this agent is very similar to the color of real gold, with the good lightfastness of the color of gold in particular.

1. Bath Composition (For make-up):

SN-7
H2SO4
Deionized Water

35-45g/L
15-20g/L
balance

2. Processing Parameters:

Voltage
Temperature
Time

10-20V
20-30
1-5min

3. Bath Maintenance:

(1) Analyze the contents of SN-7 agent and H2SO4 daily and make compensation in time if necessary, so as to minimize the fluctuation of contents.
(2) During stop-work, the coloring tank has to be covered, so as to prevent the contamination with other solution.
(3) Since SN-7 Gold-yellow coloring process can only be deepened and not it`s reverse, its operation has to be handled by qualified personnel with great care.