[argyllcms] Re: White point
- From: Nikolay Pokhilchenko <nikolay_po@xxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Wed, 24 Apr 2013 10:16:16 +0400
Graeme Gill wrote:
>Kompatscher Klaus wrote:
>
>Hi,
>
>> I do have a phenomenon which I don't now how to handle properly. By printing
>> the profiling chart
>> on colorized ceramic tile the yellow ink patches are brighter >L than the
>> white point. As a
>> result the profile does not show the possible full color space as the white
>> point cuts the
>> brighter yellow area.
>
>I guess I'm not really understanding. Is the base color yellow, or is the
>yellow
>pigment simply brighter/more reflective than the base ?
>
>[ It's a pretty usual assumption in printing that the colorants
> can only decrease the amount of light being reflected by the base material,
> and that therefore white has the highest luminance. ]
>
>Graeme Gill.
As I know, the pigments are opaque like at laserjet printing. So, bright yellow
is just natural color of opaque glazed powder. The problem is in substrate:
substrate whiteness is poor, it's just gray and darker than yellow glaze.
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