First down ink is not dry due to improper ink or heavy ink film
Increase drying speed of the ink by: Reducing first down ink viscosity Reducing ink film with better metering Changing ink formulation for faster drying Decreasing machine speed Decreasing anilox volume
Ink is not drying due to the high hold out of the substrate
Change substrate or reduce ink film thickness
Ink/Water mixture is not in balance.
Achieve and maintain proper ink/water balance. Running a minimum amount of ink water is the preferable procedure
Second down ink is not compatible with the first down ink
Consider using a transparent ink and switch trapping sequence
Second down ink is not covering due to low viscosity
Increase second down ink viscosity to higher than that of 1st down ink
Second down ink is not printing due to the ink drying too fast
Slow drying by adding glycol or increase press speed
Second down ink is not printing due to too high or too low pH
Adjust the pH or add fresh ink (non-pH stable inks only)
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