Troubleshooting

Slur: the sneaky enemy of print quality

Slur is characterised by the smearing of the printed image: the dots are distorted in printing direction, typically elongated, and exhibit an oval shape. This condition is caused by slippage at the point of contact and impression between the plate and the substrate and/or even the plate and the anilox roll. The printed image [...]

By |2018-07-30T00:04:26+00:00July 26th, 2018|Categories: Print, Troubleshooting|Tags: |0 Comments

Fear of ghosts?

With the term "ghosting" we describe the presence of a faint image of a design that shows in areas where it was not intended to appear. Usually it is a repeated pattern on print along machine direction. The main cause is attributable to the failure of replenishing, with fresh ink, the cells that discharged [...]

By |2018-07-28T10:28:30+00:00July 24th, 2018|Categories: Print, Troubleshooting|Tags: , , |0 Comments

Dot bridging

Dots in midtones screened areas, that normally should appear separated on printing, bridge together causing a dirty aspect on printed product. Main addressable cause is anilox volume too high for the selected plate linescreen, or, viceversa, plate linescreen too high for the available anilox volume. The ink, collected by the printing surface of the [...]

By |2018-07-28T10:27:29+00:00July 3rd, 2018|Categories: Print, Troubleshooting|Tags: , , |0 Comments

Plate cracking with water based inks

Plate is damaged with little cracks when using water based inks. Such fissures are evident both on plate surface and on printed product. This particular issue happened in a plant printing corrugated post-print with water based inks. The water based inks are characterised by the presence of amines in the formulation and have a [...]

By |2018-07-28T10:27:04+00:00July 3rd, 2018|Categories: Print, Troubleshooting|Tags: , , , |0 Comments

Dot dipping (in anilox)

Dot dipping describes the condition whereby the smallest dots on a flexo plate dip into the cells of the anilox roll when forced by the impression between anilox and plate. Some dots of the plate, dipping in the cells, will carry more ink than what was expected, resulting in dirty printing in highlights, typically [...]

By |2018-07-28T10:26:48+00:00June 9th, 2018|Categories: Print, Troubleshooting|Tags: , , , , , |0 Comments

Hollow dots, like donuts, perforate ink layers

Ink builds around small print elements like dots and small type creating hollow shapes like donuts. Inked dots perforate ink layers that were printed by previous printing groups. This happened on external print on plastic film, solvent based inks, flat-top plate, sequence YMCK. Combined action of excessive impression with high ink volume and [...]

By |2018-07-28T10:26:31+00:00June 3rd, 2018|Categories: Print, Troubleshooting|Tags: , , , , , |0 Comments