This additive is a powdery solid for getting stable Gold-yellow color, which has good resistance to weather and light.

1. Bath Composition (For make-up):

KMnO₄
SN-3
H₂SO₄
Deionized Water

5～10g/L
10-20g/L
15-30g/L
balance

2. Processing Parameters:

voltage
Temperature
Time

9-14V
20-25℃
3-10min

3. Bath Maintenance:

(1) Analyze the content of KMnO₄ , H₂SO₄ daily and make compensation in time.
(2) Addition of SN-3 additive: 2-4kg per ton of profile produced.
(3) In the process of production, there is certain amount of sediment in bath produced in the bottom of the tank that has no negative effect on the coloring process, but has to be cleaned in regular interval.