Re: Photogravure tissue, was B&S Carbon Tissue

If you get some current information on pricing please post the
information here. 73 cents a square foot seems remarkably inexpensive.

Sandy

> >
>
>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 17:10:41 2003