[scribus] Black and blacker.

[John Culleton]

On Wednesday 27 October 2010 13:16:07 Stéphanie Vilayphiou wrote:
> On 27/10/2010 18:47, John Culleton wrote:
> > On Wednesday 27 October 2010 12:37:53 Gregory Pittman wrote:
> >> On 10/27/2010 12:11 PM, John Culleton wrote:
> >>> I am correcting a cover file built by someone else. The author
> >>> wants a certain line of white text on black background covered
> >>> up. No problem using a rectangle. But to get the rectangle to
> >>> match in Scribus I need to use a new color of about 96% K. That
> >>> makes the rectangle match in Scribus but unmatch in acrobat
> >>> reader. A rectangle of pure 100% black does fine in Acrobat
> >>> Reader but is noticeably blacker in Scribus.
> >>>
> >>> I am using the latter choice. But only the proof copy will tell
> >>> for sure.
> >>>
> >>> The original artist used Photoshop at some point in the
> >>> process. Who knows what black she or he used? However it is
> >>> interesting that a black background which is jet black in
> >>> Acrobat Reader shows up as a very dark gray in Scribus.
> >>
> >> we have had this sort of discussion before:
> >>
> >> http://wiki.scribus.net/index.php/What_is_Rich_Black%3F
> >>
> >> The casual user has to become aware that there is Black, and
> >> there is Black. Intuitively, people want some absolute blackest
> >> of black in their output, but as Louis indicates in this quoted
> >> ML post, there are technical issues that come about with heavy
> >> use of a single ink or adding CMY to a lot of K.
> >>
> >> In the end, ask your printer.
> >>
> >> Greg
> >>
> >> _______________________________________________
> >> scribus mailing list
> >> scribus at lists.scribus.net
> >> http://lists.scribus.net/mailman/listinfo/scribus
> >
> > The printer, in this case LSI, wants rich black but no more than
> > 240% total ink coverage. The usual limit is 260%. I am just
> > trying to match what exists on the cover.  I don't know a way to
> > determine what the previous person used other than trial and
> > error.  I am not dealing with LSI directly but through the
> > customer.
>
> ah sorry, missed that mail. you seem to know all that :)
> If you want the most intense black, I suggest you follow up
> instructions for Rich black if CMYK, or 100% black for B&W. I
> usually don't trust the preview of colors in layout software.
> Acrobat has a pretty good color and overprint preview.
> does this help?
> S.
Is the Acrbat Reader view more reliable than the Scribus view for 
color matching, in your opinion?
-- 
John Culleton, Wexford Press
"Create Book Covers with Scribus" $5.95 at
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