Why Laser ?
The development of laser surface cleaning was influenced by the need to substitute the use of chemicals or abrasive blasting systems.Although other cleaning techniques remove a lot of the chemicals found in modern day inks and adhesives that tend to clog anilox roll cells,not even chemical removal touches the teflon an polyethylene used for mar and abrasion resistance.
These two materials are just too inert chemically and once attached to a roll's surface form a hydrophobic film that causes ink to bead up much like water does on a newly waxed car. The only way to remove these contaminants fully (along with other organics) is to thermally decompose them with laser light.
The laser beam is also used to engrave the roll, but with different optics and scanning modes it only burns the organics and not the ceramic.Ceramics has one of the highest surface energies around,this means the contaminants can lower it a lot more than a metal surface.Chemical cleaning leaves a film on the roll, as do all grit blasting methods. Only laser cleaning can restore the surface.
fig view on laser action
fig before cleaning
fig after cleaning
fig digital conversion view after cleaning.