[scribus] Black and blacker.

John Culleton john at wexfordpress.com
Wed Oct 27 18:47:14 CEST 2010

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
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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. 
John Culleton, Wexford Press
"Create Book Covers with Scribus" $5.95 at

Free eps format barcode: http://www.tux.org/~milgram/bookland/

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