I think that the only problem with it is the archival factor. I would
like to make the point that not only Michael Wilcox described the pigment
as impermanent but also the American Society of Testing and Materials
(ASTM), now I don't think they are going to just disappears into the
outback, so to speak,if they get it wrong.
They rated ARYLIDE YELLOW G as
category 5 ( pigments will bleach very
quickly). We cant have your pristine tri- colour gums fading can we :-) Get
the book Judy, then I'm sure you will be convinced. This isn't a waste of
bandwidth but a very serious topic.
pete