[Scribus] Re: Registration marks
avox at arcor.de
Fri Jun 24 17:27:24 CEST 2005
Faszinating stuff. I this already on Scribus Wiki? (As it should IMHO)
Louis wrote: (the rest, sorry for topposting)
>Sorry for bothering you
Don't be sorry! This gives me the occasion to add some info on
registration marks and other press marks. :)
The following may or may not apply to your specific project.
Registration marks are not an absolute necessity at this stage of the workflow.
Registration marks are not needed when:
1. The document will be printed on a digital printer (ie. where the
operator has no control on the way the machine actually does the
registration, this all being done in the color engine itself). Unless
you need to control the actual preciseness of the machine.
2. The document will be electronically imposed and then printed on an
For #2, the printer will most likely use a dedicated imposition
software that will allow to place a variety of press marks, including
sophisticated color bars. All these will help not only register the
images from the various plates to combine a complete image out of the
press, but also help control other variables, such as ink density,
dot gain, etc. These color bars are often developped by the press
manufacturer itself. The color bars and the registration marks
generated by the DTP app at output is, in this case, of no use at all
and the imposition program will discard this information because it
is not needed on press.
Registration marks however are important if you're going to print on
an offset press without any kind of imposition. That is, single page
document, printed one up. A large poster being a good example of
this. Even then, your printer will most likely want specific marks
and color bar the DTP app cannot provide and will use the imposition
In the time where imposition was done manually or mechanically, all
these marks were of upmost importance: the eye of the technician or
the "eye" of the machine needed something to look after. Digital
imposition have changed that.
If your printer still does imposition manually (many small shops
still do that), then yes, you need registration marks. Also, although
being very unlikely nowadays, you need those marks when making an
analog color proof by hand, without the help of punch holes.
The printer is the better person to help you determine for sure what
is needed in terms of registration marks.
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