Occurring of drying stains in printing

Emergence of drying stains is mainly due to the dried ink that comes to the image area of ​​the cliché…..

The emergence of drying stains is usually due to the dried paint coming to cliché’s image area. Possible causes and suggested solutions are as follows:

Pad based causes

• Pad can be too flat: a more tapered pad should be used.
• The pad may be worn and rough: the pad must be replaced.

Cliché based causes

• The depth of the cliché may be low: a deeper cliché should be prepared.
• A faulty raster may be applied to the cliché; a new cliché with an appropriate raster must be prepared.

Ink based causes

• Ink may be too thick, thinner must be added.
• Ink in cliché cavities may be dry: Cliché should be cleaned with thinner.

Material based causes

• Material may be contaminated with oil: Material surface should be cleaned with alcohol.

Other causes

• The print speed of the machine is low; increase the speed