On Wednesday 27 October 2010 13:16:07 St?phanie 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.info > >> http://lists.scribus.info/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 http://www.booklocker.com/books/4055.html
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