Poor Trapping

Problem:

First down color is not fully dry.

Solution:

Increase drying speed of first down ink by:

1. Reducing ink viscosity
2. Reducing ink film thickness by using shallower anilox volume
3. Adding faster drying solvents
4. Increasing dryer temperature and air velocity in dryer

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Problem:

Second down ink is drying too fast and not printing.

Solution:

Check and eliminate air blowing on plates; add slower drying solvents.

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Problem:

Wax or slip aid in first down ink is excessive.

Solution:

Check formula and remake ink if necessary.

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Problem:

Second down ink is not compatible with first down ink.

Solution:

Consult your Sun Chemical representative for proper ink type.