I recently came across an interesting video that was published by one anilox rolls manufacturer that, in the attempt of promoting their technology, depicts dot dipping as an industry myth and illustrates flexo users, who believe that this problem exists, as troglodytes… “The industry myth that dot dipping is occurring within the anilox cells is impossible. Physics […]
Do you really think that dot dipping doesn’t exist? Read More »
Can you recognise the cause of dirty printing in highlights?It is important to understand wether the issue is related to dot dipping, thus plate-to-anilox ratio, wrong metering of the anilox surface or other causes.What is visible on the printed product is a generally a dirty aspect that forces to repeated stops for plate cleaning and
Dirty highlights: dot dipping or ink spitting? Read More »
Ink transfer efficiency, ink coverage, color density, color matching and overall print quality strongly depend on properly maintained and clean anilox rolls.Check your anilox rolls thoroughly with proper high magnification viewing tools to ensure that your cleaning operations were effective.
Can you see how dirty is your anilox roll? Read More »
Description Causes Remedies Description Dots in midtones screened areas, that normally should appear separated on printing, bridge together causing a dirty aspect on printed product. Causes 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
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 rather high pH
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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 seen
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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 low viscosity
Hollow dots, like donuts, perforate ink layers Read More »
