>My "slow" gum that's nearly used up is 20 years old. But it's a
>commercial lithographer's gum, may have been cooked by them. In any
>event, I've never noticed a change, though it may have been glacial.
Haven't we heard at sometime on the list that "lithographers gum" isn't
really gum arabic but is really a synthetic polymer? Possibly it is
polyvinyl alcohol or a similar stuff? This cropped up somewhere in my
research on gum.
Dick Sullivan
Bostick & Sullivan
PO Box 16639, Santa Fe
NM 87506
505-474-0890 FAX 505-474-2857