Problem Solution 1. Dryer heat is too high. Reduce oven temperature. Excess dwell time in oven. Correlate press speed, web dwell time in dryer and chill roll temperature.
Paper has excessive moisture or improper density.
Blistering may not occur across the full machine reel. Run roll from a different paper machine position. Pigment strength of ink is too low, requiring more ink to be carried. Consult ink mfg. Ink coverage in multiple colors is too heavy.