Digital BW, The Print

A lot of that will depend on both the amount of OBA's (i.e. how much OBA's are being used to whiten the coating/paper)
and the whiteness of the base sheet. If the coating without OBA's is still very white, and the base sheet is very white,
any breakdown of the OBA's should not cause appreciable yellowing. We are developing coatings which are OBA free and
still very close in whiteness to the OBA containing coatings we have used in the past. IMO yellowing is caused more
often by a chemical reaction - the paper touching something acidic or otherwise chemically reacting with the coating. I
have seen prints which were not framed with acid-free materials which developed yellowing of the coating rather quickly.
OBA's do react adversely with dye molecules, but I have not seen any research where they have been shown to react
adversely with pigments.
Diana York mailto:diana@...
Hawk Mountain Papers toll free 888-807-2248
http://www.hawkmtnartpapers.com
100% Cotton Fine Art Digital Print and Photo Papers


----- Original Message ----- 
From: "luisvcool" <lvictoria@...>


Thanks John and Diana.

VFA is such a nice paper.  So since VFA has OBA's this means that it will "yellow" in
time?  Even if it's under glass?  That's disappointing.