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Chill Roll Condensation

Problem:

Streaks appear on web or signatures. This is caused by ink re-softening due to solvent condensation on chill rolls.

Solution:

Check dryer and/or chill roll temperature. Use inks with lower boiling point solvents if possible. Consult suppliers of dryer, chill rolls and inks, as necessary.

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Problem:

Dryer temperature is too high, inhibiting the ability of chill rolls to cool web efficiently.

Solution:

Decrease web exit temperature.

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Problem:

Marking appears on chills or delivery equipment.

Solution:

Check web temperature from dryer and chill rolls. Check cooling efficiency of chill roll system.

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Problem:

Excessive ink film thickness is being run.

Solution:

Consult your Sun Chemical representative about stronger ink formulations.

*The solutions provided from the troubleshooting guide are general in nature, please contact or your sales or technical representative to discuss specific issues.

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Sun Chemical offers a broad ink and coating product portfolio with a wide range of capabilities that include heatset inks, coatings, color software and brand color management.

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