Hi Yves,
Mine from Photographers' Formulary says simply "Glyoxal" and there
is a CAS Mixture Number 107-22-2, if that's any help. I am pretty
sure this is the standard 40% concentration that most people use for
our purposes but suddenly I'm not sure I know how I know that, since
there's nothing on the bottle that gives the percent solution. At
any rate it works well for me at 3 mls of the solution per 200 ml
gelatin solution, which is kind of a standard recommendation, usually
expressed as 15 ml per liter of gelatin solution. Or expressing it as
grams to grams, hardener to gelatin, as I think Ryuji was
recommending, I guess I use 1.2 (g?) of glyoxal (3 ml * .40) per 7
grams of gelatin.
Katharine
On Jan 11, 2006, at 4:43 AM, Yves Gauvreau wrote:
> Hi everyone,
>
> I know some of you use glyoxal when sizing their paper and my
> question is
> what is the full name of this product or better the chemical
> formula???. I
> ask because in my catalog I have about 5 or 6 chemicals that could
> qualify
> as glyoxal.
>
> Thanks
> Yves
>
>
Received on Wed Jan 11 22:29:28 2006
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