Re: DuPont Velour Black

From: jamesromeo <jamesromeo1934@mac.com>
Subject: Re: DuPont Velour Black
Date: Sat, 16 Jul 2005 20:40:24 -0400

> Talking about DuPont remember Varagam it was the first multi
> contrast paper.

It might be that Varigam was the first variable contrast paper to be
marketed in certain region, but Renwick of Ilford was the first one to
invent variable contrast paper in 1930's. He chose to use fine grained
high contrast emulsion sensitized with blue-green dye, while using
faster, softer emulsion without dye. Today, most manufacturers make
their variable contrast emulsions in a different way.
Received on Sat Jul 16 18:58:00 2005