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CA1030004A - Two-step photographic processing of black and white images which enhances the images by controlled bleaching during fixing immediately following development and which produces black and white images with reduced density in low-density areas - Google Patents

Two-step photographic processing of black and white images which enhances the images by controlled bleaching during fixing immediately following development and which produces black and white images with reduced density in low-density areas

Info

Publication number
CA1030004A
CA1030004A CA242,976A CA242976A CA1030004A CA 1030004 A CA1030004 A CA 1030004A CA 242976 A CA242976 A CA 242976A CA 1030004 A CA1030004 A CA 1030004A
Authority
CA
Canada
Prior art keywords
images
black
white images
density
enhances
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CA242,976A
Other languages
French (fr)
Inventor
Donald J. Sykes
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Philip A Hunt Chemical Corp
Original Assignee
Philip A Hunt Chemical Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CA187,594A external-priority patent/CA1029592A/en
Application filed by Philip A Hunt Chemical Corp filed Critical Philip A Hunt Chemical Corp
Priority to CA242,976A priority Critical patent/CA1030004A/en
Application granted granted Critical
Publication of CA1030004A publication Critical patent/CA1030004A/en
Expired legal-status Critical Current

Links

CA242,976A 1972-12-07 1976-01-06 Two-step photographic processing of black and white images which enhances the images by controlled bleaching during fixing immediately following development and which produces black and white images with reduced density in low-density areas Expired CA1030004A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA242,976A CA1030004A (en) 1972-12-07 1976-01-06 Two-step photographic processing of black and white images which enhances the images by controlled bleaching during fixing immediately following development and which produces black and white images with reduced density in low-density areas

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US31282872A 1972-12-07 1972-12-07
CA187,594A CA1029592A (en) 1972-12-07 1973-12-06 Two-step photographic processing of black and white images which enhances the images by controlled bleaching during fixing immediately following development and which produces black and white images with reduced density in low-density areas
CA242,976A CA1030004A (en) 1972-12-07 1976-01-06 Two-step photographic processing of black and white images which enhances the images by controlled bleaching during fixing immediately following development and which produces black and white images with reduced density in low-density areas

Publications (1)

Publication Number Publication Date
CA1030004A true CA1030004A (en) 1978-04-25

Family

ID=27163194

Family Applications (1)

Application Number Title Priority Date Filing Date
CA242,976A Expired CA1030004A (en) 1972-12-07 1976-01-06 Two-step photographic processing of black and white images which enhances the images by controlled bleaching during fixing immediately following development and which produces black and white images with reduced density in low-density areas

Country Status (1)

Country Link
CA (1) CA1030004A (en)

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