> On Jan 22, 2019, at 1:16 AM, Georg Seifert <georg.seif...@gmx.de> wrote: > > Hi > > I have a app that can print black shapes (using normal cocoa view based > printing). A lot users complain that the printouts are not really black (the > printouts are rastered, so the color sync tries to simulate a CMJK black but > even thou that it is black already). > > We played around with the pdf made form the print dialog. Printing that from > Adobe Acrobat produces the same results. But Acrobat has an option to convert > the PDF to optimise it for Digital printing. It attaches a genericGrayscale > profile to the PDF. > > Does any have a hint what to do? > > Thanks > Georg
The Mac has not handled monochrome black & white printing correctly for decades. I wrote an Automation action to repetitively apply a “Lightness Decrease” quartz filter to pdf documents that effectively changes a color pdf into a black & white monochrome pdf. It works well. --Richard Charles _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
