hello dear friends,
i make the follow steps in corel draw x8 :
1. i make a page 20x20 cm
2. i draw a square 20x20 cm
3. the adove file ...publish to pdf (editing format with crop marks)
4. finally import the above pdf file to a blank new page 20x20 cm.
The result is that the imported square is 20x20 cm but the crop marks ''cuts'' bigger dimensions from 20x20 (aproxx 20.16 x 20.16 cm).
Why??
Thank you in advance for your help
thanasis A.
Greece
thanasis_a said:dear Ariel, thank you for your interest. When i make a pdf file for use to another pc before snt it, i make an import to my corel for a last check. Ok, another method is to make ''manual'' the cropmarks the same time when i make my job, but the final user must delete the ''manual'' cropmarks. But on the other hand this is one problem for the corel program. Thanasis A
Hello, Thanasis. I believe this is not the right way. First of all, CorelDRAW is not a PDF editor, second it's the same application that creates the PDF. if you see right or wrong the PDF, that doesn't means the result will be the same with Acrobat or any other PDF program sucha as a RIP. For example, if you read the crop box off the page on Acrobat, the size should be exact, but usually when import the PDF there's a little difference, specially if you convert from inches to millimetes. And about the cropmarks, if you create it manually 8suinga macro, they will maintain the size and distance from the page on the PDF. For example, you can add a crop mark of 5 mm at 3 mm of distance. However, if you import the PDF back to CorelDRAW, it will show the original page size + the cropmarks size. It's just not the right way to determine the document size or the crop marks size.
Producing a PDF with crop marks in CorelDraw:
Producing a PDF with crop marks in Adobe Illustrator CC:
From the way the numbers are coming up, it makes me think that, when creating the crop marks during PDF creation, CorelDraw might be converting the positions of the crop marks into "points" somewhere during the process, and rounding to an integer number of points:
David Milisock said:Rounding errors, they exist two different ways, one in CorelDRAW and one in Illustrator. To totally eliminate the this applications would need to reduce to a single measurement standard or set all import/export functions to be multifunctional but to only use the document measurement standard no conversions.
In both of the cases above, no inherent "rounding error" is apparent at anything like the level seen with the crop marks generated by CorelDraw through "publish to PDF".
I would guess that CorelDraw is doing something sloppy with the crop marks, carrying out a significantly-rougher-than-necessary rounding - like, to an integer number of points - somewhere in the process of creating them during "publish to PDF".
David Milisock said:I never use crop marks but see rounding errors in PitStop with PDF files from various sources.
OK, to be clear, I never stated anything along the lines of, "Using program/workflow XYZ, there are absolutely no rounding errors when producing PDF files".
This thread started with observations by Thanasis about crop marks produced by CorelDraw's "publish to PDF" being less right than one might expect.
I looked at it, and I confirmed that observation.
I also observed that the errors I see in crop mark placement produced by CorelDraw's "publish to PDF" are significantly larger than those I observe when either
Yep that's about right but we see minute changes in sizes on the prepress equipment. some are dead on others are not. I use bleed sized PDF files only just for that reason. If you create PDF files for placement you may or may not see minute differences in physical dimensions.