[scribus-dev] cover.py script for perfect bound book cover design is ready.
louis.desjardins at gmail.com
Tue Dec 23 21:27:10 UTC 2014
2014-12-23 12:24 GMT-05:00 John Culleton <John at wexfordpress.com>:
> On Sat, 20 Dec 2014 16:23:37 -0500
> John Culleton <John at wexfordpress.com> wrote:
> Some printers (Createspace is one) prefer to
> specify the thickness of their book interior
> stock as a very small fraction of an inch.
> This fraction is easily converted to ppi by
> dividing the fractional amount into 2.
> When it comes to metric measurement I am a bit at
> sea. What number comparable to ppi do printers
> Similarly for perfect bound cover stock thickness
> in the USA 0.10 inch or 0.012 inch are standard
> measures. what thicknesses are common in Europe?
Europe uses GSM (grams per square meter) and thus printers seem to use a
different formulae to get the spine thickness. One is described here (in
French but I guess a Google Translation could be of some help; it’s not
overwhelmingly complicated to figure out):
The following table could be of some use as well:
I guess we have a few paths to consider with this script. Either we give
the user the mean to "calculate" the spine value (which in fact may seem
more "open source" by it’s "pedagogic" angle), or we give the user the mean
to set the cover with the proper spine as provided by the printer (which
puts all the responsibility of the exactness of that calculation in the
hands of the printer, something a lot of designers will be very glad with).
> Finally what added width and height for trim is
> common in Europe? In the USA 0.125 is the
> standard expectation.
> I set margins in inches at 0.25 + 0.125 = 0.375.
> What would be the comparable expectation in a
> cover template in a metric environment?
> I will rename my inch version of the script to
> softcover_inch.py and the metric version as
> I will publish the versions as they are completed
> whenever I get a wiki account. I have asked twice
> John Culleton
> Wexford Press
> Free list of books for self-publishers:
> Updated PDF e-book: "Create Book Covers with
> Scribus 1.4.5" coming soon at
> scribus-dev mailing list
> scribus-dev at lists.scribus.net
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