Graeme, You are teasing us. Please elaborate. I had the same 'ambitions' as Axel but only mirrored his disappointment. What exactly is 'sufficient' to achieve a match with a metameric pair? If these things are so inadequate why does UGRA/FOGRA/GATF market them? Mark On 18/11/2013, at 11:32 PM, Graeme Gill <graeme2@argyllcms.com> wrote:
Axel Robert wrote:
Dear all,
I experience some problems with different light indicators like :
PANTONE® LIGHTING INDICATOR Stickers
PIA/GATF RHEM Light Indicator
Ugra/Fogra light indicator
Those indicators seem incredibly vague in what they are supposed to do, and under what conditions they "work".
The Pantone indicator talks about "being viewed under a 5000K (degrees Kelvin) standard light source.", and the others use similar terminology, but this is nonsense - such indicators depend on the colors being visual metamers under a certain light _spectrum_. Merely being the right color temperature is not sufficient to guarantee a match.
Graeme Gill.
Mark
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