Digital BW, The Print

You got it Peter.  Metamerism is defined as changes in tone across different
light conditions...there is no such thing as no metamerism at one wavelength
(no crossover perhaps)! No Gallery that I have ever been in actually uses
5000°K lighting (its either traditional tungsten R lamps or halogen)...I can
just image telling a collector that bought a print..."oh...it will look fine
as long as you look at it under this special lamp"...that would go over
well.  So I would say the SG's are useless for fine art work.  It sounds
like Keith thinks they do well on proofing papers though...so they may be
useful for commercial uses.  The biggest problem seems to be the need to
profile though...that's a hassle compared to Piezo.

Robert

On 5/16/02 3:24 AM, "Peter Marquis-Kyle" <petermk@...> wrote:

> Paul Mapstone wrote
> 
>> I spoke to the people at Lyson in Germany  last week. They said that the
>> combination of lyson inks and paper are set up to have neutral results
>> without metamerism with the use of "Normlicht" which to you means 5000°k.
>> Which basically means outside this temperature you will get some form of
>> metamerism. The coatings of other papers are different therefore you will
>> have different effects with different papers at different light temperatures.
>> Each of us has a different tolerance to what we find acceptable.
> 
> Well, that's a very positive spin to put on the matter. I would translate the
> Lyson people's statements into plain words like this: "when we developed
> this product we ignored the problem of metamerism".
> 
> Of course, if Lyson sold the ink with a warning about this (perhaps "this
> ink is suitable only for prints to be viewed under 5000°k lighting")...
> 
> Peter Marquis-Kyle