Re: Sugar and or Glycerin

> Someone noted that sugar increases the speed at which the gelatin
> dissolves/melts. This would be of help in the development. I do not know
> if glycerin has the same effect.
>

will test this at a convenient time..
thanks

> " While digital photography has broken the chain of light..."
>
> Chain, thread, beam, or whatever, thank you for the interesting thought!
>
> Vaughn
>
I was trying to say too much at the same time, but it is an old thought
I had from trying to understand photography, in one sense the only
constant has been light - all the technology and techniques has had to
adapt to the qualities of light, either as a compositional element or
that which with the picture is made, also the print. an error in the
exposure moves through the "chain", I suppose it relates back to the
expressions as Pencil of Nature,.. and so on, but before I make more
chaos here back to Carbon
(thanks)

> PS...my tissues are made with about 110 to 120 ml of geletin per 100 sq in.
>
>

are right now using just gelatin and AmDiChro.. todays test was a 30 %
solution High Viscosity Gel with 1 % dichromate, "coated" or poured into
a clay mold on glass, making a 3 mm thick gelated coating, if I do this
kind of test properly , the whole procedure takes 4 days which is
stretching even my patience :) so I exposed it in gelated stage for 1
hour at a 1 meter distance with a 2000watts mercury halide, cooling the
sample with a fan during exposure, and straight in hot water. will have
to wait for drying, but did not look too promising. looked like it was
about the same thickness as a previous test with a 30 min exposure.
which in dry state seemed to be about 0.2 mm. there should still be
gelatin to "go on" there.

(the woodburytype mentions up to several days development ?)

        I dont think the exposure went "through". The ammonium dichromate looks
like it is filtering the UV as it has a strong orange colour, stronger
than the slightly yellow tint of the gelatin.

was thinking I should try to find the minimum possible ammount of
dichromate to use - which would reduce the color, try spectral
sensitisation, or of course try that patience and wait for things to dry
down properly before I expose... reducing the distance.. or longer
exposure..

could not the dichromate be applied as a ratio to the gelatin content
instead of the total volume of solution....?, okay it is not as simple
as one amdichro molecule per two gelatin fibrils, but...

I stop there and go back to the "why dont you try it"...solution.

would like to see/establish how thick these materials will go though-

halvor
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Received on Tue Dec 14 04:00:03 2004