Re: Glyoxal?

Formalin is very nasty stuff. If you use it indoors, it releases fumes into
the air and your eyes will burn terribly. I tried it once, opened all the
windows and left the room until the paper was dry. I resumed the task
outdoors a few days later, and have done all hardening outside ever since.

I've never seen formalin discolor paper. I've had nothing but good results
using it.

Dave in Wyoming

----- Original Message -----
From: "Yves Gauvreau" <gauvreau-yves@sympatico.ca>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Monday, January 16, 2006 7:19 AM
Subject: Re: Glyoxal?

> Hi Dave et all,
>
> one thing (amoung many) that I don't understand, I found a paper on
gelatin
> where I read that both formalin and glut are use to harden gel capsule
> amoung other things. We eat this stuff all the time and yet manipulating
it
> is harzardous. From what I can figure out, when either hardener are use
such
> that all of it get cross linked it would seem that from then on it is no
> longer a healt hazard. If this interpretation is correct, would this mean
> that all we need to do is to find the proper concentration needed to cross
> link the gelatin properly for our purpose and with proper care and safety,
> after that we should be ok???
>
> I read in this paper that we can cook gelatine at around 500 F and this
> causes polymerisation could this be useful???
>
> I have a few more question on this, one is about the color, I'd like to
know
> amoung the various hardener we can use which (if any) would be
colorless???
>
> What about permanance, is there one of these that is more "permanent" then
> the others???
>
> Are there some process that are sensitive to sizing in terms of quantity
> (thickness) RH and PH???
>
> Thanks
> Yves
>
>
> ----- Original Message -----
> From: "Dave Rose" <cactuscowboy@bresnan.net>
> To: <alt-photo-process-l@sask.usask.ca>
> Sent: Monday, January 16, 2006 8:58 AM
> Subject: Re: Glyoxal?
>
>
> > No. I would never use formalin indoors, even in very small amounts. As
> > long as it's above freezing and the wind isn't blowing too hard, plan to
> > harden your paper outside.
> >
> > Dave in Wyoming
> >
> > ----- Original Message -----
> > From: "Loris Medici" <loris.medici@altinyildiz.com.tr>
> > To: <alt-photo-process-l@sask.usask.ca>
> > Sent: Monday, January 16, 2006 4:59 AM
> > Subject: RE: Glyoxal?
> >
> >
> > > Hi all,
> > >
> > > I presume "took it outside" suggestion is when you harden in trays. I
> > > assume it would be safe to use formalin indoors when using a very
small
> > > amnt. - such as brush sizing. (Think of 100ml %3 gelatin solution +
> > > 1.5ml formalin) Am I correct here?
> > >
> > > TIA,
> > > Loris.
> > >
> > > -----Original Message-----
> > > From: Judy Seigel [mailto:jseigel@panix.com]
> > > Sent: 14 Ocak 2006 Cumartesi 05:32
> > > To: alt-photo-process-l@sask.usask.ca
> > > Subject: Re: Glyoxal?
> > >
> > >
> > >
> > >
> > > On Fri, 13 Jan 2006, Christina Z. Anderson wrote:
> > >
> > > > Personally, if I wasn't using glut I would go to formalin before
> > > > glyoxal.
> > > > It's worked for centuries--well, 1 1/2 centuries.
> > >
> > >
> > > Where do you get formalin, Chris? In NYC you need a doctor's
> > > prescription, or maybe a mortician in the family. I can get the
former,
> > >
> > > if not the latter, but don't because I find it so painful to use
indoors
> > > &
> > > don't like outdoors in winter. Plus, as I've said probably too many
> > > times, glyoxal cleared better (for me, anyway).
> > >
> > >
> > > J.
> > >
> >
>
>
Received on Mon Jan 16 08:39:57 2006