Patents Assigned to General Film Development Corporation
  • Patent number: 4029510
    Abstract: An improved silver halide film, multi-solution photographic processing method and compositions having an increased speed of processing while producing good quality images including use of a developer solution having at least two, and preferably three, different developing agents and a fixing solution which is a combination of at least two different fixing agents. The process and compositions are particularly suitable for convenient processing of x-ray film and microfilm under ordinary room temperature conditions and also for processing in small machines. Following processing, a wash in an archival quality promoting solution is beneficial for microfilm. The x-ray film processing compositions find advantageous utility in the processing of dental x-rays and may conveniently be provided in powder form, for packaging and shipping, with dissolution by the end user.
    Type: Grant
    Filed: December 23, 1974
    Date of Patent: June 14, 1977
    Assignee: General Film Development Corporation
    Inventor: Daniel Earle Speers