For each PDF/A-1 validation issue we try to explain what it means and, if possible how to resolve it. For a more technical explanation of the issue we quote the related section of the ISO 19005-1 PDF/A Specification.
Compliance Issue:
Separation and DeviceN Color Spaces
What does this mean?
PDF/A requires device specific colour space parameters to insure that the document will render and output as close to the original colors as possible.
The document specifies CMYK colour space without CMYK output intent, specifies multiple colour spaces or the colour space in use is not correctly identified.
How can I fix it?
Use a PDF creation product that correctly identifies colour space. We recommend Solid PDF Creator Plus.
If you are working with a legacy document, simply open your PDF file in Solid PDF Tools and then File | Save As PDF/A. This will add or adjust the colour space used in your PDF/A file.
6.2.3.4 - ISO 19005-1 PDF/A Specification:
A conforming reader shall obey the following rules when rendering colour spaces based on DeviceN or Separation colour spaces.
-- If the named colourants in the colour space are all from the list Cyan, Magenta, Yellow, Black, the file has an OutputIntent, and that OutputIntent is a CMYK profile, then the colourants shall be treated as components of the colour space specified by the PDF/A-1 OutputIntent dictionary, as defined in 6.2.2, and the alternate colour space shall not be used.
-- If the output device does not support the Separation colour space or DeviceN colourants, the Alternate colour space shall be used.
The Alternate colour space of a Separation or DeviceN colour space shall obey all restrictions on colour spaces specified in 6.2.3.2 and 6.2.3.3.