Sunday, April 15, 2012

DTR by Tobias using his reagent

 Very interesting result from Tobias Feltus of Edinburgh who made his own pods and reagent formula, and here used it with Shanghai 4x5 sheet film.  The top scan is of the negative, which looks quite good, and the bottom is a diffusion transfer reversal positive print from that same negative, comprised of the diffused materials from the negative during processing.

Though this P/N is not balanced, it is still a very good result as it shows there are alternate ways to perform the "New55" idea, and that there are even more material choices than we thought.

1 comment:

Justin Parker said...

Is it possible for others who wish to do this to obtain from you some advice on making your own pods. Having read through almost your whole blog now these past 2 days, and having ordered all of the great books that have been mentioned, I am not quite newly enthused about this work. Eager to apply this to my Speed Graphic.

I work in a cleanroom nanofab facility at Stanford, so I am fairly familiar with processing. I realize that the assembly of the film and receiver have to be done in the dark. You have talked a lot about the emulsion, the monobath, the cellulose thickener, I know pods should be made out of aluminized paper or the like, but what I haven't seen discussed is the receiver layer (something like fiber paper that has been fixed and maybe coated with some solution that incourages nucleation?) that you and Tobias here are using. So intrigued!!!

BTW, it seems you are past the stage of needing an SEM, and surely someone at Harvard or MIT or elsewhere in Boston has offered to help out. But I do have axess to an SEM in case you need any more SEMs.