Possible Causes:

Solution:

• Ink is drying too slow

• Use faster drying solvents
• Decrease the printing speed
• Increase air flow and temperature of blower.

• Rewind pressure is too high

• Decrease the rewind pressure

• Over plasticized inks

• Contact ink supplier.
• Add anti-blocking compound.

• Film is treated on both sides

• Use one side treated film; or
• Use anti-blocking compound.

Possible Causes:

Solution:

• High plate impression

• Check and reduce plate impression.

• Excessive ink is transferred to the plate

• Reduce anilox volume; and/or
• Check doctor blade.

Possible Causes:

Solution:

• Poor treatment of substrate

• Treat substrate to appropriate treatment level

• Improper ink for the substrate

• Contact ink supplier and request for the right ink for the substrate.

Possible Causes:

Solution:

• Excessive impression pressure

• Adjust to “kiss” impression

Possible Causes:

Solution:

• Previous ink is not fully dried

• Adjust the previous ink by:

  - Reduce viscosity

  - Use faster drying solvent

  - Increase blower volume and     temperature.

Possible Causes:

Solution:

• Ink is fast drying and drying up in the anilox roll

• Use a slower drying solvent

• Not enough ink going into the anilox cells

• Reduce press speed; or

  Reduce ink viscosity to allow faster entry of ink into the anilox cells.