Pattern Overprint Conflict

hello,

 

i helped out printing maps using spot-colors.  turned out hall hatch patterns defined in pdf file (export mapping program) came out knock-out, specified overprint in mapping software. however, when previewing file in acrobat 9, areas filled these patterns came out overprint intended.  surprised patterns came out knockout print.

 

it turned out that, when looking matter, actual strokes of hatch pattern definitions defined knockout stroke, objects filled pattern specified overprint fill.

 

then question: 1 rules on other.  in acrobat, object fill overprint ruled on pattern stroke definition overprint, while in printing shop's rip, other way around.

 

does pdf-standard provide clear definition of how such situation dealt with?

 

it nice if interpreters handle in same way.

 

agnar renolen

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i believe depends on sophistication , how old printer's rip software is, , systems use. different shops use different software , workflows. have old equipment , old software that's held rubber bands , duct tape, while others have latest , greatest.

 

some shops able input pdf directly workflow, such kodak's prinergy. but, expensive system. still have these mom & pop shops still placing pdfs in quark pages , other workarounds. jobs done, it's done chain saw.

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