We've run into some troubles with our standard refine template.
In our refine template the setting "enable overprint gray" under the color convert page is checked. We've run through this template tons of files and there weren't any problems ever.
But this time we've got a pdf file for print with some kind a "strange" structure. There are 2 images in file: first is gray-based with overprint on (opm 1) and the second cmyk-based with overprint on (opm 1) laying under the first one. As i understand from pdf reference 1.6 the printing result of such images combination is gonna be knockout on the first image.
After refine the first image became 1 spot monotone-based (separation: black) with overprint on (opm 1). The problem is that this image is white rectangle used as a background in a table. So, at the output there was no background at all (see the file attached). We didn't see that, client didn't see that in files for approval and this file was printed as the "after refine" in the attached file.
This is the first time in five years working we've got 10.000 rejected books because of one damn checkbox.
So my question is what option do you use in your refine templates: "enable gray overprint" on or off? Did you ever have any troubles with this checkbox?
I need to make a decision if turning this option on or off by the default.
ps sorry for poor english
In our refine template the setting "enable overprint gray" under the color convert page is checked. We've run through this template tons of files and there weren't any problems ever.
But this time we've got a pdf file for print with some kind a "strange" structure. There are 2 images in file: first is gray-based with overprint on (opm 1) and the second cmyk-based with overprint on (opm 1) laying under the first one. As i understand from pdf reference 1.6 the printing result of such images combination is gonna be knockout on the first image.
After refine the first image became 1 spot monotone-based (separation: black) with overprint on (opm 1). The problem is that this image is white rectangle used as a background in a table. So, at the output there was no background at all (see the file attached). We didn't see that, client didn't see that in files for approval and this file was printed as the "after refine" in the attached file.
This is the first time in five years working we've got 10.000 rejected books because of one damn checkbox.
So my question is what option do you use in your refine templates: "enable gray overprint" on or off? Did you ever have any troubles with this checkbox?
I need to make a decision if turning this option on or off by the default.
ps sorry for poor english