Re: alum for carbon tissue
Tox Gunn (tox@remarque.berkeley.edu)
Mon, 21 Oct 96 13:40:59 PDT
Judy said:
aside from making the linkage of the glyoxal more permanent, it preserves
it -- the working solution otherwise goes off in a couple of days,
polymerized -- at least mine did. And with students hardening paper all
month, I was running out of glyoxal too quickly. However, Paulchemprof
suggests trying sodium bicarbonate instead, for a reason I didn't
understand, but I will....
Judy
(endquote)
Many polymerization reactions are catalyzed/made possible/occur faster under
acidic conditions.Maybe the bicarb is just to buffer the pH a bit higher so
as to slow the polymerzation down?
Tox
***********************************************
* Tox Gunn .......tox@remarque.berkeley.edu *
* "Your sanity is not my responsibility!" *
***********************************************