99福利视频-福利看片-成人福利网站-亚洲福利在线观看 日韩av中文字无码_国产高清自产拍av在线_自拍亚洲日韩一区_91国内精品久久人妻无码大片

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.