Troubleshooting Guide - Pressroom Conventional
On Press Issue: Chalking
Potential Causes
Ink film is too thin because ink strength is too strong
Solution: Reformulate ink or make weaker at press by adding extender or tint base.
Fountain solution pH too low
Solution: Check pH of solution. pH of lower than 3.5 can slow drying. Adjust pH of fountain solution.
Ink body is too soft causing excess penetration into substrate
Solution: Reformulate ink for heavier body showing penetration. Heavy body, high solid varnishes added at press will help.
