Processing compositions for color transfer processes comprising alkali metal fluorides

- Eastman Kodak Company

Improvements in the physical characteristics of a photographic assemblage, especially an integral transfer element, are obtained by employing an alkali metal salt in the alkaline processing composition used to process the assemblage. The anion of the salt has a solubility in relation to that of sulfate such that after processing in the presence of calcium and sulfate ions, calcium will combine with said anion in preference to sulfate at any given pH. Especially preferred salts are alkali metal fluorides or oxalates.

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Claims

1. In a photographic assemblage comprising:

a. a support having thereon at least one photosensitive silver halide emulsion layer having associated therewith a dye image-providing material;
b. a dye image-receiving layer; and
c. an alkaline processing composition having a pH of at least about 11 and means for discharging same within said assemblage;

2. The assemblage of claim 1 wherein:

a. said dye image-receiving layer is located between said support and said silver halide emulsion layer; and
b. said assemblage also includes a transparent cover sheet over the layer outermost from said support.

3. The assemblage of claim 2 wherein said cover sheet is coated with, in sequence, a neutralizing layer and a timing layer.

4. The assemblage of claim 3 wherein said discharging means is a rupturable container containing said alkaline processing composition and an opacifying agent, said container being so positioned during processing of said assemblage that a compressive force applied to said container will effect a discharge of the container's contents between said transparent sheet and the layer outermost from said support.

5. The assemblage of claim 1 wherein said salt is present in said processing composition at a concentration of from about 0.01 N to about 0.5 N.

Referenced Cited
U.S. Patent Documents
B351673 January 1975 Fleckenstein et al.
2543181 February 1951 Land
2697036 December 1954 Higgins et al.
2706157 April 1955 Sainsbury et al.
2983606 May 1961 Rogers
3260598 July 1966 Yutzy et al.
3351465 November 1967 Mendelsohn
3362819 January 1968 Land
3362821 January 1968 Land
3415644 January 1968 Land
3415645 January 1968 Land
3415646 January 1968 Land
3635707 January 1972 Cole
3706561 December 1972 Mowrey et al.
3756815 September 1973 Schlein et al.
3811888 May 1974 Shibaoka et al.
Foreign Patent Documents
674082 June 1963 CAX
928559 June 1973 CAX
1330524 September 1973 GBX
Other references
  • "Additions to Diffusion Transfer Developing Compositions," Research Disclosure No. 11420, 10/1973 p. 21.
Patent History
Patent number: RE29942
Type: Grant
Filed: May 1, 1978
Date of Patent: Mar 20, 1979
Assignee: Eastman Kodak Company (Rochester, NY)
Inventor: David E. Hannie (Pittsford, NY)
Primary Examiner: Richard L. Schilling
Attorney: Harold E. Cole
Application Number: 5/901,969
Classifications
Current U.S. Class: 96/29D; And Electric Field Separation Apparatus (96/3); 96/66R; 96/664; Flow Distribution Means For Parallel Sections (96/73); 96/76C; Serially Arranged Ionizing And Collecting Or Agglomerating Fields (96/77)
International Classification: G03C 700; G03C 554; G03C 530; G03C 140;