Gary Miller (email@example.com)
Sat, 03 Jul 1999 20:13:15 -0700
I have used a few drops of 40% glyoxal as a preservative for gum, and it
seems to work. The fact is that it has only been a few months, but the
stuff seems to be fine.
----- Original Message -----
From: Judy Seigel <firstname.lastname@example.org>
Sent: Saturday, July 03, 1999 7:46 PM
Subject: RE: preservative for gum arabic (fwd)
> There seems to have been some misunderstanding about my comments on gum
> arabic preservatives, so let me clarify.
> Firstly, my inclusion of mercury was not intended to suggest you go out
> and get some mercury.... I was being Ironic. It's hot here in NYC.
> Secondly, someone less heat afflicted than I reminded me of my comments in
> P-F #1, where I recommended 2 drops per oz of formaldehyde or phenol,
> and noted that my tests of salicylic acid didn't work well.
> But I myself mostly use the commercial lithographers 14 degrees baume
> already preserved -- in my experience that's the best. (The Philben is
> best of the best, BTW.) But if you're making home made, and have
> formaldehyde, 2 drops per ounce isn't going to call out the chemistry
> police, no fumes, honest, & the gum will thus keep forever. If you
> don't have formaldehyde, & can't borrow a few drops, thymol may well be
> next choice -- it's recommended and worked fine when I used it, though I
> haven't done comparison tests.
> I've never used glyoxal for gum arabic and was speculating, assuming,
> thinking it should, might also work...
> Is that perfectly clear, *now* ???
This archive was generated by hypermail 2.0b3 on Thu Oct 28 1999 - 21:40:35