Before outputting your final copies from the laser printer, do the following check: produce a wide black box across your laser paper and check irregularity in the density of the black. If you feel there is room for improvement, make sure the toner is completely full (some machine's output go grey before the refill signal comes on), check your manual for cleaning instructions to clean the charge wire, wipe the rollers (etc), and use the best paper stock possible (laser paper or a good smooth opaque paper) to get as even a black as you possible can before attempting a printout with text and tone values on the same page.
Sometimes it might be necessary to increase your tone value about 5%-10% when using 10%-40% screens to allow for loss in reproduction from your laser prints to film, then plate, then blanket and finally to the printed paper stock. Conversely, high density screens have a tendency to gain value, so sometimes it might be necessary to deduct about 5%-10% from 70%-90% screens.
If you are super critical about your screen work or have multiple screen build-ups, we strongly recommend you print out directly to film. A practical way to save a few dollars if you only have a few pages with screens or half tones would be to bunch these together on a few pages and only submitting these for film output. You basically copy out these pages from your document and create a new document just for film output.
Marrakech Express can both go from paper printouts (laser printouts), film and direct to plate. The most economical way is still to go from laser output which you have output yourself.
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Copyright © 1994 Marrakech
Inc. All rights reserved.
Revised: April 17, 2001
