Re: printing black
> On 22 Jan 2019, at 18:23, Alastair Houghton > wrote: > > There’s often a printer setting on users’ printers to tell them to use (just) > black ink. This also shows up in Cocoa Print dialogs under “Printer features” or as a “Greyscale” checkbox. I have it turned on by default. Jeremy ___ 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
Re: printing black
On 22 Jan 2019, at 08:16, Georg Seifert 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? There’s often a printer setting on users’ printers to tell them to use (just) black ink. OTOH I think the problem is that Quartz by default prints using “rich black” (i.e. C+M+Y+K) rather than black, which is *sometimes* the right thing to do and makes sense in some respects, but when you really want *just black* it’s annoying. It’s probably also muddy looking on many inkjet printers. I don’t know whether it’s possible use color spaces to tell Quartz to use just plain black. It quite probably is (you might find using CMYK colours and just picking K will work, I don’t know; ColorSync could still interfere, mind). Kind regards, Alastair. -- http://alastairs-place.net ___ 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
Re: printing black
> On Jan 22, 2019, at 1:16 AM, Georg Seifert 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
printing black
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 ___ 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
