Digital BW, The Print

Hi Paul,
   Slight correction, There are no white "Dyes" for inclusion in paper for Chemical and process reasons, however, TiO is more resistant to fade or yellowing but, because of the current particle "size" and cost it doesn't contain enough to do a long term job, and is still susceptible to "light stimulated atmospheric pollutants".

The good news is that small quantaties of a range of 10nm to 25nm particles in combination, seem to do the job, and are under test at the moment, so I guess we will see a change soon.

John_e

----- Original Message ----
From: Paul Roark <paul.roark@...t>
To: DigitalBlackandWhiteThePrint@yahoogroups.com
Sent: Friday, 6 April, 2007 6:22:31 AM
Subject: RE: [Digital BW] Kayenta yellowing too!

Hi Richard,

>I just put a Kayenta print on my wall (the room is always shady) 
>and to my horror, the one I put up on 1st Feb has gone about as 
>yellow as Epson Velvet - showing yellowing very similar to 
>Epson Enhanced Matte or Epson Heavyweight Matte.

Let us know if the Premier Art brightened paper also yellows. A company
representative has told me that his company uses titanium dioxide as the
brightener, not the dyes that are in most of the other papers. This should
make the brightener much more stable.

On the other hand, if the yellowing is happening in a shady room, it may be
a gas attack and not brightener fading.

Paul
www.PaulRoark. com 




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