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. -- John Culleton, Wexford Press "Create Book Covers with Scribus" $5.95 at http://www.booklocker.com/books/4055.html Free eps format barcode: http://www.tux.org/~milgram/bookland/
