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We found by switching solution suppliers, Varn to Sun chemical, made a big difference. We very seldom see them anymore.

My original post did not say anything about angles. I was referring to percent of ink coverage. My ‘Example: Y@13% M@30% C@50% K@84%- set the Blue at the yellow angle.’ is not screen angles. I don’t care what angles he is running. I just meant to use the yellow angle because of the least coverage.

We run into this all the time. Just set your Blue spot at the angle of the 4c with the least coverage. Example: Y@13% M@30% C@50% K@84%- set the Blue at the yellow angle.

We are doing our checks before going to press as in cleaning the VLF’s drum roller, as we know it picks up metal plate shavings occasionally. However we thought we should see any marks caused by this. Plates are inspected just for these marks and nothing can be seen. One thought was maybe the...

They seem to appear out of no where, no set amount of sheets or run time. The Press crew cleans blankets and after start up they will re appear after 3000 sheets.

It is in random areas across the sheet. Never in the same area. Always in the press direction and CTP direction from lead edge to trail edge of sheet. When we pull the plates from press, we see a small shiny mark on the plate as if it was scratched. We do not see this on plate prior to going to...

We see them predominately in the dark units especially Black and dark spot colors. In the ligher colors they blend in with the print and are not easily seen. I am leaning towards Kaoticor’s comments as that’s what I have guessed by talking to a few of the pressmen. As of now it’s easier for the...

Can someone identify these press marks? The pressmen are calling them chatter marks. I do not think they are chatter marks but marks coming from a chrome roller for whatever reason. We have monitored the plates for a period of time and also had the Fuji reps. in and there are no indications the...

Attached are two pictures of the job bags (size 21”x25”) we utilize to carry the color/copy approvals as they go to press. I had ordered them through Uline in the past but they no longer carry them. These were perfect as they stood upright in the pin at press and protected the approvals. They...