Tinting

Problem:

Fountain solution has wrong pH or conductivity.

Solution:

Adjust pH/conductivity to manufacturer’s specifications. Consult a Sun Chemical representative.

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Problem:

Roller durometer or setting is wrong.

Solution:

Use proper roller and check setting.

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Problem:

Prolonged use of a detergent wash has occurred.

Solution:

Wash-up thoroughly and use hot water for final wash-up.

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Problem:

Too much pressure exists between plate and blanket.

Solution:

Check and reset.

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Problem:

Paper coatings and fountain solution are contaminating and glazing the ink train rollers.

Solution:

Use lowest tack ink possible, and properly balanced dampening solution.

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Problem:

Plates are improperly exposed and developed.

Solution:

Consult your pre-press department.

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Problem:

Ink is improperly formulated.

Solution:

Consult a Sun Chemical representative.

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Problem:

Detergent is present in fountain solution.

Solution:

Eliminate detergent.

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Problem:

Temperatures are too high in fountain solution pan and/or ink vibrator roll.

Solution:

Adjust to recommended temperature range.