Re: photgravure sensitizing solutions
biskops arno (biskops@algonet.se)
Thu, 12 Dec 1996 11:42:35 +0100
>A general query to any photogravure practitioners out there:
>For sensitizing gelatin resists I have been using the formula outlined in
>Gary Kolb's book Photogravure - a process handbook which calls for a 3.5%
>potassium dichromate solution mixed to the following proportions:
>35 grams of potassium dichromate dissolved in 1 liter of distilled water.
>
For sensitizing pimenttissue Autotype G 25 I use Potassium dichromate
in 2,5 % , 2,7 % or 3,0%. Which dilution I choose depends on my positiv.
If I use 2,5 % or 2,7 % I has better possibilties for good highlight
details.
When I was working with this tests I could see much better results with so
small variations in sensitizing. The problem is the positivefilm, have been
working with Arista APHS a good film many times but it needs a hard
developing work. Miss a lot af good old halfttones film, as Orwos FU 2.
lasse Mellberg