From: Sandy King (sanking@CLEMSON.EDU)
Date: 10/08/01-11:19:02 AM Z
Hi Witho,
>Hello Sandy,
>
>I will try your method later on. Now some information on the three points.
>
>1 I pour the gelatin mix (my King I/just sumi ink etc.formula, as described
>in your tutorial )on plexi. I wait a few minutes and than have a wet paper
>(squeezed) over it. Let it dry in my darkroom. The result is a mirror like
>black surface.
Any possibility that the wave pattern may be created on the back side
of the tissue at this time.
>
>2 I sensitize in a 3% ammoniumdichromate solution, immersing the tissue for
>3 minutes and hanging it to dry overnight in a dark room. (All done under
>safe light conditions).
This should not create a problem, but I would advise squeeging out
the excesss tissue on a piece of plexi and allowing it to dry face
down on the plexi.
>
>3 Alcohol dip is from Pollmeier as described in issue 2 or 3 in
>Post-factory. It is an after squeeze pre development treatment to facilitate
>stripping the tissue from the plexi.
This should not be necessary if you are using a plastic compatible
with the tissue, ie, one that will hold the image during warm water
development and release it later to the final support. I can not
imagine how it would cause the wave pattern. Alcohol can harden
gelatin and might be causing the wave pattern but I tend to doubt it.
I will wait to comment further after seeing a more detailed
description of your working method.
Sandy King
>
>Witho
>
>----- Original Message -----
>From: "Sandy King" <sanking@CLEMSON.EDU>
>To: <alt-photo-process-l@skyway.usask.ca>
>Sent: Monday, October 08, 2001 5:53 PM
>Subject: Re: Carbon double transfer
>
>
>>
>> I have developed on many kinds of plastics and have not seen this
>> kind of wave pattern. My procedure is quite simple. Soak the exposed
>> tissue in cool water for about a minute, squeegee together with the
>> plastic and place under a piece of plate glasss for 15-30 minutes,
>> then develop in warm water for 6 minutes, stripping the tissue from
>> the plastic at 2 minutes.
>>
>> My opinion is that your problem is not being caused by separating the
>> tissue from plexi but by one of the following:
>>
>> 1. method of making tissue, including drying
>> 2. method of sensitizing
>> 3. alcohol dip
>>
>>
>>
>> Sandy King
>>
>>
>>
>>
>>
>>
>> >I'm busy doing double transfer carbon printing. Until now I am getting
>each
>> >time marks from, I guess, separating the tissue from the plexi (wave like
>> >patterns as the sea leaves on a beach). Before developing I give the
>plexi
>> >with tissues a 10 minute rest and after that a 2 minute alcohol dip. How
>can
>> >I avoid these marks.
>> >I have separated tissue and plexi after two minutes but also after 4
>minutes
>> >of development in 40-42 Celsius. In both cases I had the marks.
>> >
>> >Witho
>>
>>
>> --
>>
--
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