Last week after i have to check problem and production process line, found that they still have occur regular stain on parts. So i recommend them try our new product of epclen-9300 for solve this problem because i think that this problem, may be related to alkali cleaning (epclen-52NS).
Condition for try: 1. Conc. 25 ml/L, Time 5 mins, Temp. 60 0C
2. After new make-up. We will count the basket dip in chemical until it first occur stain on parts, for check lifetime of chemical/volume (pcs).
3. Collect data 4-5 days and summarize with them.