Alberto, Very many thanks for all the references. I am ,now, speculating as to why Namius decided to incorporate Rosin (colophony) powder into the pigment mix following his discovery with oil mentioned in the citation. It was a great surprise to me when I saw the image coming up as a negative from a negative. The ink I used was, in fact, very ''hard/stiff/ thick'' as it had been used the previous day and was still sticky on the tile and the roller. There are, of course, as many variables in this Oil process as there are in Gum printing and Gordon has mentioned most of them in the report of his recent test printing. Glad to know his encouraging outcome from hand coated paper rather than factory stuff.
Am pushing on, at present, with trying a one time heavier gelatine coating of 20% with a 0.5% Amm Dich.sensitizer and paper negative. I like to use low sensitizer levels as it gives a much wider range of exposure control. My ideal is to put the contact pack outside in the sunshine at 8 am. and develop seven hours later after domestic chores and shopping have been done.
Gordon's success account is something that needs a bit of studying. So, see you later.
A bientot. John.
Received on 05/29/06-12:38:11 PM Z
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