From: Judy Seigel (jseigel@panix.com)
Date: 01/28/03-06:53:52 PM Z
On Tue, 28 Jan 2003, Scott Wainer wrote:
> Hi Ryuji,
>
> Sorry for the confusion over the spelling of Glyoxal; I was feeling a bit
> dyslexic and did not use the spellcheck.
>
Scott, are you going to tell us with a straight face that your spellcheck
has got GLYOXAL ?!!! Mine doesn't even have cyanotype, much less
kallitype, or a surprising number of terms we consider standard English.
What marvelous program would that be?
Meanwhile, I think a point needs to be made about the glyoxal. However
dandy your nitrogen blasts are, I have no trouble keeping the 40% glyoxal
in a half empty or near-empty bottle. It's the 15% solution diluted for
use that goes off -- and within a day or two. It's not the use that does
it, or at least not that I could tell. I put some diluted in a pretty full
bottle without using it, and it still died... and this was with the methyl
alcohol that's supposed to be a preservative.
That's a really good price from city chemical by the way... They're
terrifically expensive on some other things... a friend paid something
like $100 for a gram of gold from them before he knew better... Must have
been pure spun fairy gold... ?
cheers,
Judy
> 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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