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| 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  | 
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| 2. Operational Parameters: | ||
| 
			 Voltage Temperature pH value Time  | 
			
			 15 V~18 V 20 ℃±5 ℃ 0.8~1.0 1 min~15 min  | 
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| 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.  | 
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