Re: Glyoxal?

Christina et all,

I started this message and my power supply gave up on me, maybe I should
blame you for this, just joking. Here is the link in case you want to check
it out for yourself http://www.omri.org/Gelatin-TAP.pdf

Regards
Yves

----- Original Message -----
From: "Christina Z. Anderson" <zphoto@montana.net>
To: "Alt List" <alt-photo-process-l@sask.usask.ca>
Sent: Monday, January 16, 2006 10:15 AM
Subject: Re: Glyoxal?

> Yves,
> Pretty soon my website will be up, and yesterday I took all my glyoxal
> samples of paper, scanned them, cut and pasted a square of each paper in a
> grid to show the varying shades of ivory from very pale to unacceptable
> brown that I got with glyoxal sized paper. It is really fascinating.
>
> I hope you all appreciate this one little image because it was a pain in
the
> ass to make! 15 scans for one lousy image...
>
> The one paper that was acceptable with glyoxal was the rinsed right after
> hardening Fabriano Soft Press. There was no Fabriano Hot Press paper that
> was acceptable. Cold Press was in between.
>
> My variables I manipulated were Fabriano cold, hot, and soft press.
Rinsing
> and not rinsing. Light and no light. Air and no air. My water supply was
> city water in SC, not well water like here in MT.
>
> Who knows what can be made of it all--rinsing did not work for Fabriano HP
> either, so my guess is that glyoxal yellowing is very paper dependent,
> coupled with some other factor--probably amount of glyoxal used as Ryuji
has
> suggested. I used 25ml to a liter. So if you are not using hot pressed
> Fabriano you may be OK.
>
> My problem with sizing outdoors, and hence tray hardening, is that means I
> can't do it very often. Thus brush sizing with a thermos is the way to go
> for me. I personally like Kerik Kouklis' suggestion to add drops of
> formalin in each 10ml of sizing brushed onto a sheet of paper. But then
> again, I only use glut now so I doubt if I will try it anytime soon.
>
> I had no idea glut was in our capsules we swallow! IInteresting factoid.
>
> To answer two of your questions, glut is very permanent, never had to
resize
> after the first time. And completely colorless.
>
> The information I am lacking on glut, really, is its use on other papers
> aside from Fabriano, so at this point I am a one trick pony as far as
sizing
> for gum is concerned.
> Chris
>
>
> ----- 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 12:19:04 2006