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BY-C11C Electrolytic Coloring Additive in Sn-salt Bath
This additive is a powdery solid that can stabilize Sn2+ion efficiently and improve color-uniformity and reproducibility. This additive should be stored in a place avoiding of light and the storage time is in one year.
1. Bath Composition:
 

BY-C11C

SnSO4

H2SO4

Deionized Water

10 g/L~15 g/L

15 g/L~20 g/L

8 g/L~15 g/L

balance

2. Operational Parameters:
 

Voltage

Temperature

pH value

Time

15 V~18 V

20 ℃±5 ℃

0.8~1.0

1 min~15 min

3. Bath Maintenance:
 

(1)Analyze the contents of free H2SO4 , SnSO4 and total acid value daily, Every additional  1Kg of SnSO4 at the same time add 0.5kg~1kg of BY-C11C.
(2)Add purified water slowly with agitation, so as to prevent the local hydrolysis of SnSO4 which may cause the bath solution becoming turbid. 
(3) After long period of production, there will be white sediment formed in the bottom of  the tank that should be cleaned by filtration or decantation.

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