From: John Prokos <email@example.com>
Subject: .AN?liquid emulsions?
Date: Sun, 15 Feb 2004 23:01:52 +0545
> Does anyone here have experience with Rockland Liquid Emulsions?
I don't have experience with this product. I make my own from scratch,
so below is based on my batches, not on that product, though my
batches are pretty standard silver gelatin material.
> Does the surface temperature you apply the emulsion to matter? I would
> imagine it should be approximately the same as the emulsion if possible
That is probably ideal to get most even result. If the surface is
cooler, viscosity may go up as you work the coating.
> How strongly does it adhere to the surface it is brushed onto? What
> if the surface is not porous? Or is very porous?
Paper, cloth etc. -- no problem. Suede leather -- small dripped
emulsion sticked there without cleaning or brushing on the surface
(though if you want to use leather, I'd clean the surface and brush.)
Glass -- needs good cleaning, and I'd use surfactant (PhotoFlo, Triton
X-100, etc.), hardener (glutaraldehyde), plasticizer (glycerol aka
glycerin, triethylene glycol). As far as I know, Kate does this way
except with formaldehyde. After coating, chill setting at lowest
temperature you can get easily (but without freezing) works the best.
I put coated glass in fridge for several minutes, then take them out
for drying at room temperature.
For paper and other absorbent material, it's ok to dilute the emulsion
a bit. But for glass and other smooth surfaces, I'd use thickest
> Can I use a toner like Kodak Selenium Toner on the emulsion?
Yes. Make sure to fix it very well, especially if your coating is
> Are there any extra materials or equipment I will need other than a brush a
> surface and the emulsion?
Anything you can use to do water jacket at 35-40C. I use a brown
glass dish to hold emulsion, and put this in a shallow water bath on a
heating surface, so that I can use 4-inch brush easily.
-- Ryuji Suzuki "Reality has always had too many heads." (Bob Dylan, Cold Irons Bound, 1997)Received on Sun Feb 15 12:51:33 2004
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