Troubleshooting Guide - Pressroom Coatings
Issue: Mottle in Coating
Potential Causes
Ridges in the direction of travel caused by too little coating
Solution: Increase amount of coating. Adjust blanket to back cylinder to achieve 'kiss contact.'
Coating is being 'pushed' into the ink
Solution: Reduce pressure to get uniform application.
Viscocity is too low and is 'soaking into job'
Solution: Specify higher viscocity coating.
