How to avoid paper curling while drying?

[unrealalex]

Hi All,

I make gelatin paper for process with bichromates: oilprint, resinotype, etc.
I use 6% gelatin solution with some additions:
100 ml 6% gelatin:
- glycerin 4ml (acts as plasticizer)
- 1% Salicylic acid alcohol solution - 2ml (acts as preserver and prevent bubbles formation)
- Alum - 0.13g in 10ml of water (hardener)

I coat paper in this way:
- put paper in a tray of warm water for 2 minutes
- squeeze on glass with rubber roller
- remove excess water with paper towel
- pour hot emulsion and spread it with glass tube or plastic comb.
- wait 5 minutes for setting gelatin
- put glass with paper in the refrigerator for 20 minutes
- remove paper from glass and hang to dry

But after 24h of drying I get curl and other paper distortion
How can I avoid those distortion? What do you think?

 

[yashasvi bhuta]

http://in.groups.yahoo.com/neo/groups/oilprinting/files kinldy join the group and help everyone troubleshoot such issues.

btw it's a very simple thing do one thing make a solution on 1:3 glycerine and brush it on the back before you put it for flattening

 

[Vaughn]

After rolling the wet paper on the glass, tape the paper to the glass all the way around it. Dry it on the glass.

 

[richard ide]

Once the paper has dried on glass, it will curl depending on the environmental humidity. Would it be possible to coat both sides by dipping the sheet and removing the excess with a couple of glass rods (or one; one pass for each side). With both sides coated, the sheet will be in equilibrium and curling would be minimal.