Gerhard Fuernkranz wrote:
2. What about Graeme's printer profiles, if the printer was not characterized for D50, but for a different illuminant? My understanding is, that Graeme's profiles generally (regardless of the deivce type) record the absolute color of media white (under the actual viewing illuminant) in the wtpt tag, and in order to establish the tables, he transforms the measurements (as measured under the actual viewing illuminant) with a Bradford CAT from absolute media white to D50.

I was thinking about that, and with a 'chad' tag I could fix this so
that ICCV4absolute gives a D50 adapted result, while the version
that uses 'chad' will give the selected illuminant result.

Strictly speaking such profiles (those set to use an illuminant other than
D50) are not ICC compatible, and can only be used in combination with
another profile using the same illuminant. Very useful for proofing,
not much use for anything else.

Graeme Gill.


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