>You must meet Dunstan. There is no one else like him ! <
You can say that again Terry !!!
>I think that I have already said this. I think I started this whole Gloy bit.
when an art school had not had its gum arabic delivered and I had to get
students to scour the local stationers.<
I am loath to get into a if you show me yours I will show you mine scenario,
but just for the record I started using gloy in the late 1970's before that
I employed, Lion spreader gum sold in Wooly's which was an absolutely
perfect colloid, and then suddenly it was no longer available, so it had to
be gloy, but I was completely convinced that it was a form of gum Arabic
with perhaps some preservatives and surfactants added
Judy's critique in the APR article came as a complete
bombshell.I instantly contacted Henkel and they informed me that no gum
arabic was in the mixture only Polyvinal Acetate and Alcohol glycerine
surfactants and colouring matter. However Henkel did state, that when they
formulated this gum every effort was made to duplicate the quality of the
original stationary gum in viscosity, colour ,and adhesion, without the
difficulties associated with the original formula such as acidification
which has always been a problem with natural gum Arabic.
> I do not mean PVA, I mean Gloy. I do not know what surfactants and colour
Henkel add to to the PVA but it works similarly to gum arabic. Straight PVA is
unusable at the second coat. There may be ways of overcoming this but I will not
find out until I have to. One of my students has some kind of in with Henkel and
may be able to find out, but they would not tell me.<
So Terry Gloy gum is PVA after all
pete