Photogravure tissue, was B&S Carbon Tissue

>

Thank Craig, for that information. I have been using the red Autotype gravure
tissue, and I can imagine that it would be difficult to see the etch progress
with a black pigmented tissue. Autotype's website says that the gravure tissue
is sold in the 65 foot rolls only, so I will call them on Monday, and see what
other sizes they may offer. Do you know of any other retailers for their
tissue? By the way, which tissue are you using, the G25 or the G35?

Regards, Jack R.

Craig Zammiello wrote:

> The pigment used is a reddish/brown iron oxide. It has been traditionally
> been this color so that:
>
> 1.) It limits the diffusion of light within the gelatin layer during
> exposure. As far as the gelatin and dichromate are concerned, iron oxide,
> ground fine enough, is chemically inert and has little effect on the overall
> function of these ingredients.
>
> 2.) As Sandy states, this enables the worker to visually see progress under
> various illuminations ( red, yellow and daylight) and to also to monitor the
> progress of etching through the gelatin stencil.
>
> There are other ingredients which are added to Autotype tissue to give it
> pliability and to act as preservatives. They also modify the working
> qualities of their tissue by offering two grades, a normal or "flat"
> contrast (G25) and a high contrast (G35), by using a different bloom of
> gelatin. All of these are proprietary formulas.
> They come in different length and width rolls, so the $350.00 price was
> obviously a big one.
> Cheer, Craig Z.
Received on Sat Dec 6 16:34:05 2003