Re: Gelatin (waterproofing)

----- Original Message -----
From: "Phillip Murphy" <pmurf@bellsouth.net>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Sunday, December 21, 2003 2:28 PM
Subject: Re: Gelatin (waterproofing)

> Thank you for the information. However, in this
particular case,
> that quality is especially desired.
>
> I'm looking for a means of keeping water from
> effecting the gelatin layer, perhaps a coating of some
> kind but it would need to be an extremely thin one.
>
> I'm hoping for a solution that would render the gelatin
> impervious to water.
>
> best regards,
>
> -Phillip

   Many years ago Kodak made a product called Kodak Print
Laquer. I remember using it but don't know what was in it.
It could be sprayed on the surface of a print or the entire
print could be dipped in it. If used only on the surface of
an fiber print it would serve mainly to protect the surface
of the print from abrasion since both the support and Baryta
layer are permeable.
   I also remember some ancient publicity photos from a
family business which had probably been dried and ferrotyped
on a drum dryer. The prints curled tightly and the surfaces
had cracked so that they looked like dried mud. These prints
were probably no more than 10 to 20 years old at that time.
Laquer may make sense for protecting displayed prints but I
don't think its recommended any more for thos which are to
be stored archivally.
  Krylon, and others, make spray-on print laquers, both
shiny and matt finish.

> Ryuji Suzuki wrote:
>
> > From: Phillip Murphy <pmurf@bellsouth.net>
> > Subject: Gelatin (waterproofing)
> > Date: Sun, 21 Dec 2003 07:51:38 -0600
> >
> > > Is it possible to prevent a dried gelatin layer from
taking up
> > > moisture from the atmosphere? Is it possible to
prevent
> > > water in contact with the layer from swelling the
gelatin?
> > > (In essence, waterproofing the gelatin)
> >
> > "I don't know whether it is possible but it is certainly
undesirable."
>
>

---
Richard Knoppow
Los Angeles, CA, USA
dickburk@ix.netcom.com