From: Scott Wainer (smwbmp@starpower.net)
Date: 01/28/03-03:35:57 PM Z
Hi Ryuji,
Sorry for the confusion over the spelling of Glyoxal; I was feeling a bit
dyslexic and did not use the spellcheck.
I order it through Photographer's Formulary (
http://www.photoformulary.com/index.htm ) for 22.00 USD per pint they also
list it at 8.95 USD for 100 ml. City Chemical lists it between 15.25 USD for
1 kg and 166.00 USD for 22 kg; but I think they have a 200.00 minimum
purchase.
I haven't had any problems keeping it since I displace the air (oxygen) in
all liquid containers with nitrogen (non-reactive) that I get through a
local bottled gas supplier. It is a nifty trick that I read about
somewhere - I have kept a half-full bottle of concentrated Rodinal for over
a year and it performed as if fresh.
As for other hardeners, there is Formaldehyde and Potassium, Chrome, or
Ammonium Alum. I use hardeners only when absolutely necessary (which is to
say almost never). Eliminate the hardener and use more care and you should
not have any problems.
Thanks for the response,
Scott Wainer
smwbmp@starpower.net
----- Original Message -----
From: "Ryuji Suzuki -- JF7WEX" <RSuzuki@MIT.EDU>
To: <alt-photo-process-l@skyway.usask.ca>
Sent: Tuesday, January 28, 2003 10:48 AM
Subject: gelatin hardener (was: paper for cyanotype or other alt processes)
> From: Scott Wainer <smwbmp@starpower.net>
> Subject: Re: Spam Alert: paper for cyanotype or other alt processes
> Date: Mon, 27 Jan 2003 22:11:44 -0500
>
> > The traditional cyanotype formula used (see the James' book) does not
seem
> > to conflict with additional gelatin sizing or the use of a hardening
bath
> > (Glyaxol).
>
> You said "glyaxol" twice, but is it glyoxal (oxalaldehyde) by any
> chance? How do you keep the solution? (It doesn't last long in
> contact with air) Who's your supplier and how much do you pay for it?
>
> I'm interested in trying it or glutaraldehyde to harden gelatin in
> silver halide emulsion. Did anyone try these? (What's the hardener
> MACO sells with their liquid emulsion - does anyone know?)
>
> Thanks!!
> --
> Ryuji Suzuki
> "You're crazy man, there's no one here but me and my machines!" (Neil
Young)
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