martin_pistor Posted July 25, 2005 Share Posted July 25, 2005 Hi folks, after evaluating POP via a greyscale I found xtrahard negs are required. Any recommendations how to produce negatives with a appr. Dmin-Dmax of 2 or even a little more from subjects with normal contrast (wich is normally regarded to be 30-100 or log. 1,5-2) meaning I'd need a gamma of more then 1. Internegative process is known, but I'd like to use my 8x10 negs directly. Thanks, Martin Link to comment Share on other sites More sharing options...
john_shriver Posted July 25, 2005 Share Posted July 25, 2005 Expose longer, develop longer. See the HD curves for the films. Kodak's T-MAX data sheet is particularly generous with information. See the discussions on negative making at http://www.michaelandpaula.com, as they also prefer longer-scale negatives for AZO paper. (You might get hooked on AZO, too.) Also see the B&W Photo - Alternative Processes forum here. Link to comment Share on other sites More sharing options...
patrick_gainer Posted July 28, 2005 Share Posted July 28, 2005 Consider using a pyrogallol or catechol staining developer which produces higher contrast for POP and graded paper than for VC paper. PMK and Pyrocat HD are popular. You may also use a bleach and redevelop process to add the stain density to unstained negatives that are too low in contrast for POP. Bleach in a rehalogenating ferricyanide-bromide solution as is used for sepia toning. Wash, then redevelop to completion in PMK or Pyrocat in room light. Washing is necessacry, fixing is not. Link to comment Share on other sites More sharing options...
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