Mottle

Problem:

Ink viscosity is too low.

Solution:

Increase ink viscosity.

______________________________________________________________________

Problem:

Ink viscosity is too high.

Solution:

Reduce ink viscosity.

______________________________________________________________________

Problem:

Paper stock is too dry.

Solution:

Introduce moist air.

______________________________________________________________________

Problem:

Ink is not wetting stock properly.

Solution:

Change blade angle, then change solvent selection.

______________________________________________________________________

Problem:

Ink or substrate is too cold

Solution:

Vary temperature of ink and substrate. Allow to warm to room temperature.

______________________________________________________________________

Problem:

Pigment selection is poor.

Solution:

Reformulate ink.

______________________________________________________________________

Problem:

Cylinder is too deep.

Solution:

Re-etch or replace cylinder.

______________________________________________________________________

Problem:

Print impression is excessive.

Solution:

Reset for lighter impression.

______________________________________________________________________

Problem:

Press returned ink is unusable.

Solution:

Increase resin solids. Use fresh ink.

______________________________________________________________________

Problem:

Press speed is too low.

Solution:

Increase press speed.

______________________________________________________________________

Problem:

Ink might be printing characteristics of substrate.

Solution:

Check alternate substrate for smoother surface.