2011/11/20 Zdenek Wagner <zdenek.wag...@gmail.com>: > Printed colour samples are commercially available. > They are printed on different types of papers and CMYK values are given.
Is there any such thing available in book form? That is, could you make a recommendation? Here in Taiwan, there is something commonly sold called Pantone彩色聖經 (Pantone Cai3Se4 Sheng4Jing1 = Pantone Color Bible). I did finally locate one in a bookstore yesterday, but it was sealed up and I wasn't allowed to open it without buying it. Dan 2011/11/20 Zdenek Wagner <zdenek.wag...@gmail.com>: > 2011/11/20 Daniel Greenhoe <dgreen...@gmail.com>: >> 2011/11/20 Zdenek Wagner <zdenek.wag...@gmail.com>: >>> No. >> >>> LCMS is a good choice. >> LCMS is "Little Color Management System"? >> (http://www.color.org/opensource.xalter)? >> > Yes. > >>> 1. It ensures that the colours you specify in the document will be >>> converted to cmyk. >>> However, the corrections are wrong. >>> 2. xcolor does not look into inserted graphics,... >> >> But what if I hand define all my colors using cmyk syntax like this for >> example >> \definecolor{magenta}{cmyk}{0,1,0,0} >> and create all my graphics using pstricks and related packages (with >> no inserted graphics)? >> Then won't the resulting pdf be cmyk compliant and contain exactly the >> colors I defined? >> > That's what I do. Printed colour samples are commercially available. > They are printed on different types of papers and CMYK values are > given. Thus you select the required colour on a proper paper and use > it. Sometimes I select the colour in gimp and then using LCMS convert > the values from RGB to CMYK. Scanned images are also easy. I keep them > as TIF, using LCMS convert them to CMYK and then by tiff2pdf to PDF > that can be included by \includegraphics. > >> Dan >> >> >> >> >> 2011/11/20 Zdenek Wagner <zdenek.wag...@gmail.com>: >>> 2011/11/19 Daniel Greenhoe <dgreen...@gmail.com>: >>>> Print shops often require pdf files containing color to be encoded >>>> using CMYK colorspace values. >>>> >>>> Version 2.11 of the xcolor package says that cmyk is "supported by >>>> Postscripts directly" (page 8). So if I simply specify >>>> \usepackage[cmyk]{xcolor} >>>> in the preamble and compile with XeTeX/XeLaTeX, is that sufficient to >>>> ensure the resulting pdf is cmyk encoded? >>>> >>> No. >>> >>> 1. It ensures that the colours you specify in the document will be >>> converted to cmyk. However, the corrections are wrong. If you wish to >>> convert the colours properly, you have to use colour profiles. LCMS is >>> a good choice. Useful ICC profiles come with different products as >>> Adobe Reader, colour printers, scanners etc. They can also be >>> downloaded from the web. Calculations in the xcolor package can only >>> be used if you are satisfied with approximate colours. It is written >>> in the documentation that conversions are device dependent. >>> >>> 2. xcolor does not look into inserted graphics, you have to convert >>> your images to cmyk separately. Again LCMS is a good tool for this >>> purpose. >>> >>>> Secondly, is there any free utility available for checking the >>>> colorspace encoding of pdf files (maybe similar to foolab's pdffonts >>>> for checking embedded fonts). >>>> >>> I have not found any. Since I produce PDF files for printing very >>> often, I calculated that commercial Adobe Acrobat is cheaper than the >>> risk of paying unusable books, thus I have bought it. >>> >>>> Many thanks in advance, >>>> Dan >>>> >>>> >>>> -------------------------------------------------- >>>> Subscriptions, Archive, and List information, etc.: >>>> http://tug.org/mailman/listinfo/xetex >>>> >>> >>> >>> >>> -- >>> Zdeněk Wagner >>> http://hroch486.icpf.cas.cz/wagner/ >>> http://icebearsoft.euweb.cz >>> >>> >>> >>> -------------------------------------------------- >>> Subscriptions, Archive, and List information, etc.: >>> http://tug.org/mailman/listinfo/xetex >>> >> >> >> >> -------------------------------------------------- >> Subscriptions, Archive, and List information, etc.: >> http://tug.org/mailman/listinfo/xetex >> > > > > -- > Zdeněk Wagner > http://hroch486.icpf.cas.cz/wagner/ > http://icebearsoft.euweb.cz > > > > -------------------------------------------------- > Subscriptions, Archive, and List information, etc.: > http://tug.org/mailman/listinfo/xetex > -------------------------------------------------- Subscriptions, Archive, and List information, etc.: http://tug.org/mailman/listinfo/xetex
