Flexographic

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Adhesion

Problem:

Surface is not ink or lacquer receptive.

Solution:

Treat substrate if treatable, but do not over-treat; change to recommended ink type; and/or coating primer if possible.

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Problem:

Ink is not drying properly.

Solution:

Add faster drying solvents and/or increase air and heat delivery. Thin inks if possible.

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Problem:

Ink is brittle due to insufficient amount of plasticizer.

Solution:

Add small amount of plasticizer.

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Problem:

Ink choice is improper for substrate.

Solution:

Reformulate ink for specific substrate.

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Problem:

Ink viscosity is too high.

Solution:

Reduce ink viscosity to proper level.

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Problem:

Web temperature is too low for substrate and ink.

Solution:

Increase web temperature to adequate level for substrate and ink.

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Problem:

Re-worked ink has an out-of-balance pigment to vehicle ratio.

Solution:

Remake ink or refresh ink with fresh pigment and resin.

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

Information about Sun Chemical

Sun Chemical offers a broad portfolio of inks, coatings, color software and brand color management for flexographic printing.

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