Side raster area

[janezl]

Hello,
at several (mostly web) printing houses, I have seen practice, that on printing plate, outside of printing area, patch with raster (FM or AM) is put, in order to make even water/ink distribution over plate.
How is this patch called in english graphic terminology?

Thanks, Janez

 

[GazKL440]

ok posted reply it disappeared.. we do this to even out coverage on jobs that have solids on one side and text on other, flattens out sheet for back up takes out the head f**k you can get with varied curl..usually a 30% screen in the forage off tail of job.. Have had many beers and cant remember the technical term or even if there is one but will make one up.. "Ink coverage to paper ratio balance strip" I think i had a better term before

 

[Bret Hesler]

On our web forms we use the tints off the sides of the sheets to keep the water from building up where there is no paper to take it away. We call them edge tints, but I originally learned the concept as morning bands. You could probably do the same on sheetfed, but it would be best to keep the tints on the paper, not bleeding off the edge, or the ink will build up on the back cylinders.

Bret

 

[GazKL440]

yeah thats how we do it keep it a couple of mm in from sheet edge to avoid messin up back cyl's helps heaps when turning over a job.., flattens out the job makes back up feeding much much easier