RE: Brush for Liquid Emulsion

Hi all,

Sorry to disagree, Judy, but if you're using a cheap brush with metal
ferrule, it will rust in time - from washing afterwards if not actually
through reaction with coating chemistry, contaminating the bristles. And
even if it's varnished, there'll still be exposed metal on the inside of the
ferrule. But it shouldn't matter if it's of a non-rusting metal that
doesn't react with your chemistry, e.g. aluminium for silver-gelatine.

Liam

-----Original Message-----
From: Judy Seigel [mailto:jseigel@panix.com]
Sent: 16 February 2005 02:02
To: alt-photo-process-l@sask.usask.ca
Subject: Re: Brush for Liquid Emulsion

On Tue, 15 Feb 2005 Ritab19106@aol.com wrote:

> In checking out the picture on their website, it looks like the brush has
a
> metal ferrule. I know one has to do something about that when using it
for
> liquid emulsion...please remind me of the technique.
>

Rita, folks get very uptight about the metal ferrule when they're using
brushes for dichromate processes also, but it's mostly another one of
those old geezer tales -- unless you actually get the ferrule of the brush
in the emulsion, which I myself have never seen or heard of. However if
you think this might happen, you can be utterly and entirely safe by
coating the ferrule with clear nail polish or some other hard-drying
varnish.

(In fact, whether getting the ferrule actually in the emulsion would
actually matter has been debated --- but it's easy enough to be on the
safe side.)

Judy
Received on Tue Feb 15 20:27:42 2005