Re: printing black
Re: printing black
- Subject: Re: printing black
- From: Alastair Houghton <email@hidden>
- Date: Tue, 22 Jan 2019 18:23:36 +0000
On 22 Jan 2019, at 08:16, Georg Seifert <email@hidden> 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 (email@hidden)
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:
This email sent to email@hidden