Re: printing black
Re: printing black
- Subject: Re: printing black
- From: Richard Charles <email@hidden>
- Date: Tue, 22 Jan 2019 05:30:59 -0700
> On Jan 22, 2019, at 1:16 AM, 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?
>
> 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
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