Patents Assigned to Tetenal Photowerk Walter Grabig
  • Patent number: 4075014
    Abstract: The invention relates to a color-positive process for producing a color surface picture using color paper having diffusion-resistant and protected color couplers or plastic-coated or plastic uncoated color paper of color negatives, and features color developing the picture at a temperature in the range of from about 20.degree. C to about 50.degree. C with a developer having added thereto a development accelerator having the formula: ##STR1## wherein R.sub.1 and R.sub.2 are H, CH.sub.3, or CH.sub.2 --CH.sub.3 and "n" is in the range of from 1 to 4, bleach fixing and stabilizing the picture in a solution having a pH from about 5.5 to about 6.0 without an intermediate step of washing or a stop-fixing bath, and thereafter, washing the picture.
    Type: Grant
    Filed: February 12, 1976
    Date of Patent: February 21, 1978
    Assignee: Tetenal Photowerk Walter Grabig
    Inventor: Wolfgang Gerhardt