Blocking/Offset

Problem:

Ink is not drying properly.

Solution:

Add faster drying solvents and increase air flow.

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Problem:

Solvents are trapped.

Solution:

Add faster drying solvents and increase air flow.

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Problem:

Web is rewound too tight.

Solution:

Reduce chill roll temperature.

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Problem:

Rewind pressure is excessive on web.

Solution:

Reduce web tension.

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Problem:

Ink or varnish is over plasticized.

Solution:

Remake ink or varnish. Add anti-block agent.

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Problem:

Ink or top lacquer is soft or has a low melting point.

Solution:

Remake ink or lacquer.

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Problem:

Web temperature is low.

Solution:

Increase web temperature.

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Problem:

Moisture condensation appears on the chill roll.

Solution:

Reset chill rolls to above dew point eliminate moisture.