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SN-8 Electrolytic Coloring Additive of purple bronze Color
It comprises 3 agents ,the first one is for bath make-up ,the second one is called additive(A) which is a light green solid mixture and the last one is additive(B),a light red transparent liquid .The color produced by this agent will be very similar to purple bronze, with the good lightfastness and weather fastness. 
1. Bath Composition (For make-up):
 

SN-8

H2SO4

Deionized Water 

30 g/L

16 g/L

balance

2. Operational Parameters:
 

Voltage

Temperature

Time

15 V~18 V

15 ℃~25 ℃

2 min~6 min

3. Bath Solution Maintenance:
 

1 During the normal produce, analyze the concentrations of Cu2+ and H2SO4 daily. Make compensation in time if necessary, the compensation ratio between SN-8(A) and SN-8(B) is 1:2.
2 Do not touch Aluminum Profile without gloves, when contrast colors.
3 The product after colored shouldn’t stay in air and after watering bath for a long time 
4 Colored Aluminum Profile must have a good conductive.
5 Aluminum Profile need a mid-temperature sealing or cool sealing and surface passivating treatment before electrophoresis treatment if it need in next process .

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