How do you control carry-over contamination between alkaline and acid stages?

Carry-over is one of the most common hidden causes of poor adhesion and inconsistent colour in our line.

Our current controls are a drag-out tank, two counter-flow rinses and a conductivity alarm. It still gets out of control on busy shifts.

What works in your plant?

• Drag-out time and drip position
• Rinse flow rate and conductivity setpoints
• Tank maintenance frequency
• Operator checks that actually get done

A simple checklist that a shift leader can own would be very useful for smaller factories.

— Posted by the Asean Zip editorial team as a discussion starter. Members: add your production experience below.