Re: SE-1 + Wetting Agent - Shelf life

[richard jones <richard_cynan@yahoo.co.uk>]

Thanks Kate,

 

Can the alcohol and hardener be added before melting. I would normally cut open and carve out the contents into equal sized portions, say 25g each. Will SE1 last as long with additives, or should alcohol/hardener only be added when reactivating (does that just mean melting).

 

What's healthier, formaldehyde or chrome alum?

 

----- Original Message ----
From: Kate M <kateb@paradise.net.nz>
To: alt-photo-process-l@usask.ca
Sent: Monday, 4 December, 2006 9:55:19 PM
Subject: RE: SE-1 + Wetting Agent - Shelf life

Hi Richard, I haven't used this particular emulsion, but here's what I've experienced with Jessop's, Liquid Light and Tetenal work. I separate my emulsion into black film containers and don't add any wetting agent at that stage (or ever come to think of it! I do add a little alcohol to cut foaming when I reactivate. Wouldn't wetting agent cause coating problems with bubbles?). I always keep the containers in a black bag or box until use, as I'm not totally convinced they are lightproof. Also, when you heat them up, the tops can pop off so always reactivate under safelight ,or in the dark. I've coated plates with emulsion and come back to them over a year later. They still print perfectly. I always harden the emulsion with formaldehyde before coating glass, it's the only way I can prevent frilling and lifting of the emulsion during development. I think age-cured emulsion (more than a month) doesn't have as many frilling problems. Well, at least that's my experience.

 

Cheers

Kate

-----Original Message-----
From: richard jones [mailto:richard_cynan@yahoo.co.uk]
Sent: Tuesday, 5 December 2006 6:17 a.m.
To: alt-photo-process-l@usask.ca
Subject: SE-1 + Wetting Agent - Shelf life

Hello to all the alt-photoists out there, this is my first post.  I'm trying Dry plates at the moment and would like to figure out a cost/space affective way of working. Here's my question...s

 

Does adding wetting agent (ilford) affect the shelf-life of (silverprint) SE-1 emulsion?

 

I would like to separate a 240ml bottle of emulsion into smaller film containers and add 5ml wetting agent to each.

 

Also...

 

Under dry, lightproof conditions how long will a coated plate last for?

 

And...

 

Does the ISO of SE-1 emulsion change over time like Liquid Light?

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