[tex-live] ICC profiles for PDF/A compliance

Reinhard Kotucha reinhard.kotucha at web.de
Sun Sep 9 01:01:03 CEST 2018

On 2018-09-07 at 10:34:23 +0900, Norbert Preining wrote:

 > Interesting. They seem to have a big mess up there ;-)

Yes, but maybe I can provide more information.

First of all, the pdfx package was formerly maintained by Thành and
Radhakrishnan at Sarovar.  There was a web page with HTML
documentation and a file "sRGBIEC1966-2.1.icm".  See attachment.

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At this time I was working on a PDF/A implementation in LuaTeX for a
commercial product.  I couldn't use this profile because there was no
explicit license, only a string within the file

  "Copyright (c) 1998 Hewlett-Packard Company" 

Thus I looked for a better one and found
"sRGB_IEC61966-2-1_black_scaled.icc" at color.org.  The license was
not only good for my project, it was good for FSF, Debian, and TeX
Live as well.  So I asked Ross, the new maintainer of pdfx, to replace 
"sRGBIEC1966-2.1.icm" by "sRGB_IEC61966-2-1_black_scaled.icc".

What I didn't know until yesterday:  Debian guys found out that
there were two conflicting licenses.  One allows and one forbids
modification.  They asked the ICC for clarification and the answer
was not delightful.  As a result, the ICC changed the license
statement on their web site.

Below is the PostScript code shipped with Ghostscript
("Resource/ColorSpace/sRGB").  It contains the line

   % sRGB color space derived from the public domain HP sample.

which makes me believe that it's derived from the same file
"sRGBIEC1966-2.1.icm" Thành formerly maintained at Sarovar.

Presumably HP shipped this file on CDs accompanied by their printers
without further licensing information.

The data in the file below is freely available, see


So if we don't find an ICC sRGB profile with an appropriate license we
can create one ourselves with a license which makes everybody happy.
All we need is a specification of the .icc binary format.

For the time being, Norbert, could you add the file


to tlcontrib if you haven't done this already?


% Copyright (C) 2001-2018 Artifex Software, Inc.
% All Rights Reserved.
% This software is provided AS-IS with no warranty, either express or
% implied.
% This software is distributed under license and may not be copied,
% modified or distributed except as expressly authorized under the terms
% of the license contained in the file LICENSE in this distribution.
% Refer to licensing information at http://www.artifex.com or contact
% Artifex Software, Inc.,  1305 Grant Avenue - Suite 200, Novato,
% CA 94945, U.S.A., +1(415)492-9861, for further information.

% sRGB color space derived from the public domain HP sample.

currentglobal true setglobal

[ /CIEBasedABC
  3 dict begin
    /WhitePoint [ 0.9505 1 1.0890 ] def % D65

    /DecodeLMN [  % sRGB gamma transform 
      { dup 0.03928 le { 12.92321 div } { 0.055 add 1.055 div 2.4 exp } ifelse }
      bind dup dup ] def

    /MatrixLMN [ % sRGB to XYZ (D65) matrix (ITU-R BT.709-2 Primaries)
      0.412457 0.212673 0.019334
      0.357576 0.715152 0.119192
      0.180437 0.072175 0.950301 ] def
  currentdict end
/ColorSpace defineresource pop


Reinhard Kotucha                            Phone: +49-511-3373112
Marschnerstr. 25
D-30167 Hannover                    mailto:reinhard.kotucha at web.de

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