Re: Flattening Paper- Mini Tutorial

[John Grocott <john.grocott403@ntlworld.com>]

Clair and Whoever,
         Brushing gelatine solution depends on the weight of my paper, 
anything from 80gsm to 400gsm.The lighter weight paper will curl when I 
apply gelatine solution to the back of it so, I have tried brushing on to 
keyed Plexi first , then holding the sheet down with a sheet of cheap lining 
paper, smoothing it out with the flat of my hand, then with a rubber roller 
to squeeze out  the air bubbles.

               With weights up from about 120gsm I can apply gelatine 
solution, without so much curling, directly to the back of my printing 
paper, placing the Plexi sheet onto this, smoothing out, then turning the 
sandwich over and, again removing air bubbles with rubber roller.

                 I have tried weaker gelatine solutions ( 5% to 10% ) but 
for  multiple coatings the stronger mix will keep the print paper adhered to 
the Plexi sheet through subsequent coatings and drying stages.

Hope this helps.
John - Photographist - London - UK
...............................................
----- Original Message ----- 
From: "cadunn" <cadunn@vt2000.com>
To: <alt-photo-process-l@usask.ca>
Sent: Thursday, May 01, 2008 1:57 PM
Subject: Re: Flattening Paper (was Seeking Information on 2 problems with 
Gum process)


> John-
> Do you meant that the gelatin is on the plexi -- then paper on top -- ? 
> And, how does this prevent curling when you dry it between coats?
>
>
> John Grocott wrote:
>
> >           First, I always apply my paper to a sheet of  sandpapered 
> > Plexiglass witha brushed 10% Gelatine solution.  The multiple coatings 
> > can be made with the paper held down this way and finally snapped off 
> > when finished and dried.
> > It works for me.
> > Good Luck. John - Photographist - London - UK