El 04/10/12 11:24, Alexandre Prokoudine escribió:
On Thu, Oct 4, 2012 at 11:13 AM, Jakub Jankiewicz<[email protected]> wrote:
Hi all,
I read about Pantone on Wikipedia and it's say that Free Software don't
support it, is there a hack that will allow to prepare pdf with pantone
inside?
No hacks, just use Scribus.
http://wiki.scribus.net/canvas/How_to_legally_obtain_spot_colour_palettes_for_use_in_Scribus_1.3.3.x_and_later_versions
Swatchbooker can create a sRGB converstion of the Formula books (which
are in CIE Lab).
The Formula books are supposed to be used for spot colors and for
intermediate/late binding 4-color process workflows (which means working
with RGB and converting to CMYK later).
So you can have a reasonable approximation in Inkscape and GIMP, for
instance, using Swatchbooker to convert Pantone Formula guides to .gpl
palettes.
Pantone Bridge books are only advised to be used if your print workflow
is CMYK from the beginning (early binding). If you'll rely on RGB assets
(like images created in GIMP) it's better to use an intermediate or late
binding workflow.
So here's my suggestion:
If by "Pantone PDFs" you mean Pantone Spots, use the Formula swatches,
straight from Scribus. It's the only free application that can manage
spot colors at the moment (it's possible to achieve something usable
with Inkscape, then taking the file to scribus, but it's a hackish way).
If by "Pantone PDFs" you mean a PDF in CMYK with the exact CMYK values
you get from your bridge book, you have two options: Again, to use
Scribus which is the only early-binding-capable program in the free
software wold, or to adopt an Intermediate or Late Binding workflow,
using the sRGB values from the Formula swatches (not the sRGB rendering
you have in the bridge guide, which is a screenmatch for CMYK values).
I bet that reading "work in sRGB for print" sounds very wrong, but trust
me. If your print provider doesn't use the exact print configuration
Pantone used for their books (which is the most probable situation),
there will be a difference between the books and the prints you get,
because of the paper stocks, print configuration, weather, etc.
That difference is comparable to what you get from working with a color
managed RGB workflow. The only tricky part with intermediate binding is
taking care of black ink when it has to be used as spot (in small size
black body text, for instance).
For that, Scribus gives you the tools for using a pure K black in your
design elements so you get 100%K in your output instead of composite black.
Cheers,
Gez.
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