Abstract: The invention is directed to an aqueous developing composition which is useful in developing negative-working lithographic printing plates. More particularly, the developing composition includes an organic solvent, a surfactant, and a gelatin, which is present as more than 3% by weight of the total developer.

Abstract: The invention is directed to a process for treating a photographic support in the form of a web, said process comprising providing a first grounded drum shaped electrically conductive electrode and at least one electrically conductive wire electrode of which the diameter varies between 60 and 1500 &mgr;m facing said drum shaped electrode, establishing an AC voltage with a frequency range between 100 Hz to 300 kHz over said electrodes, moving the web at atmospheric pressure along said drum shaped electrode, thereby exposing it to atmospheric pressure glow discharge established between the said drum shaped and wire electrode.

Abstract: A method has been found for producing a set of exposed photographic color negatives for use in calibrating a developing and a printing machine system for making photographic color prints, wherein all the exposures are carried out to the same multicolored object which also contains a grey reference part while using the same type of photosensitive film material, and the exposures comprise at least 8 normal (N) exposures, at least 4 over (O) exposures and at least 4 under (U) exposures, at a ratio of the number of N/O/U exposures of 5/(2-3)/(2-3), and include, in the order given, each of the four sequences NN/NN; NN/OO; NN/UU; and UU/OO, or NN/NN, NN/UU; NN/OO and OO/UU. The set of exposed negatives thus produced is used in a method for calibrating a developing and a printing machine system for making photographic color prints.

Abstract: A tabular silver halide emulsion wherein the tabular grains account for more than 75% of the total grain projected area said emulsion comprising silver halide grains nucleated in the presence of nucleation peptizer and thereafter grown in the presence of growth peptizer, wherein at least one of the peptizers is substantially pure collagen like material prepared by genetic engineering, said peptizer having an amino acid sequence comprising more than 4 different amino acids. A process of preparing the AgX emulsion. A process of producing recombinant collagen like polypeptide comprising expression of a collagen like polypeptide encoding nucleic acid sequence by a microorganism to a degree exceeding 0.95 grammes/liter, said recombinant collagen being free of helix structure and preferably the expression occurring in a microorganism other than E. coli or Saccharomyces cerevisiae.