Troubleshooting Guide - Pressroom Coatings

Issue: Blocking/Bricking in Delivery

Potential Causes

Excessive heat, moisture & pressure

Solution: Reduce pile temperature, rack loads 8-12", increase exhaust.

Coating is drying too slowly

Solution: Reduce viscocity with 1:1 IPA/water, increase airflow.

Ink not setting in delivery

Solution: Use faster setting inks, reduce water setting, minimize alcohol sub.

Blocking on 2nd pass (re-softening first side of coating)

Solution: Increase time before backup, wind sheets before backup, reduce coating film, reduce load temperature on 2nd pass, rack loads 8-12", increase spray powder.