Re: Brush for Liquid Emulsion

From: Jack Brubaker <jack@jackbrubaker.com>
Subject: Re: Brush for Liquid Emulsion
Date: Wed, 23 Feb 2005 18:35:21 -0500

> I have used metal ferrule brushes with no problem, in fact I know
> one metalsmith who uses pot. bich. in a weak sol. as a rust
> preventative. It causes a "chromate conversion" on the surface of
> the steel that makes it non-rusting.

I suppose you lost track of the issue, but this came up in the context
of silver gelatin, and there is nothing like dichromate in silver
gelatin emulsion. I personally don't find much problem with high
quality stainless steel ferrule brushes I tried, chemical
contamination is a real source of headache in silver gelatin process
because anything that affects the silver halide crystals may have huge
potential consequence to the image during or after development.

--
Ryuji Suzuki
"Well, believing is all right, just don't let the wrong people know
what it's all about." (Bob Dylan, Need a Woman, 1982)