Hi guys.
I've just discovered one very disturbing thing.I don't know if I'm doing something wrong.For example lets make 4 squares.Each with different line thickness: 0.08mm / 0.06mm / 0.04mm and hairline.Now save it as pdf and now open (import) again in Corel. Now thickness will be like that: 0.08 / hairline / hairline / hairlineInformation in pdf is correct because if you open this pdf with Illustrator all lines have correct thickness.This means that Corel changes line thickness during import???It seems that during the import all lines with a thickness less than 0.078mm are converted to hairline.This is some nightmare.Can you please check if you have the same?Or maybe there is some solution for that (some setting)?
What version of CorelDRAW? What operating system?
The CorelDRAW PDF export process was never intended as a round trip process, meaning that a PDF exported is not intended to be imported into Draw. An exported PDF from Draw is intended to be used as a container file for output. Sharing CorelDRAW files is intended to be done via the CDR, CMX format, IMO only via the CDRCfile format.
As you have tested, the exported PDF when imported into Illustrator contains the correct line weights. The questions are now, does CorelDRAW change the line weight upon importation or does it simply default to labeling line weights of .06mm and less as hairline?
I'll test it later today.
Ok here's is what I have found. Looking at the created PDF files in multiple PR-PRESS PDF editors and CorelDRAW.
CorelDRAW when publishing to PDF press setting produces a PDF that is incorrect when viewed in Acrobat, and two RIPs with PDF plugins, the first three line weights .08, .06, .04 are correct the hairline is incorrect.
This is regardless if it's mm or inches, if you set drawing precision to 6 you can get Draw to display and create the line weights in inches to display correctly in Draw only.
CorelDRAW imports or opens its own PDF incorrectly, only one line weight is correct the first one, .08mm.
CorelDRAW prints to a PS level 3 file correctly and can import that PS file correctly.
With all this said I believe there is a limitation on the minimum line weight in PDF as none of my PDF generation software can reproduce a proper PDF even when CorelDRAW is removed from the equation by using a PS file.
All my documentation lists .25 points/.088MM as a minimum weight.
This is what Acrobat Preflight shows for the PDF generated by CorelDRAW:
0.08 mm = 0.227 pt
0.06 mm = 0.170 pt
0.04 mm = 0.113 pt
0.0762 mm = 0.216 pt
The information for line width is correct in the Corel-generated PDF.
That's what I'm seeing om my display also for some reason the smallest line weight defaults to very near the documented (in my RIPs) PDF line weight.
Again, that's a significant verified documentation that line weights under .004 mm are unreproducible in PDF as I got duplicated results by generating PDF files via a distilled postscript process.
Draw in my opinion should have a goal of reproducing RIP results on PDF import. Illustrator and Draw should be developing warning about lite line weights.