EP 0697619 A2 19960221 - High-contrast photographic elements with improved maximum density
Title (en)
High-contrast photographic elements with improved maximum density
Title (de)
Photographische Hochkontrastelemente mit verbesserter Maximaldichte
Title (fr)
Eléments photographiques à contraste élevé et à densité maximale améliorée
Publication
Application
Priority
US 29211994 A 19940817
Abstract (en)
A high-contrast room-light-handleable black-and-white silver halide photographic element that is especially adapted for use in the field of graphic arts comprises fine-grain high-chloride silver halide grains doped with a dopant comprised of a transition metal and a nitrosyl or thionitrosyl coordination ligand. The dopant is present in the grains in an amount sufficient to reduce speed and increase contrast and at least 25 percent by weight of the total amount of the dopant within the grains is located within the outermost 90 percent of the total grain volume to reduce the effects of solarization and intermittency and thereby enhance the maximum density of the element.
IPC 1-7
IPC 8 full level
G03C 1/035 (2006.01); G03C 1/06 (2006.01); G03C 1/08 (2006.01); G03C 1/09 (2006.01)
CPC (source: EP)
G03C 1/08 (2013.01)
Citation (applicant)
- US 4933272 A 19900612 - MCDUGLE WOODROW G [US], et al
- US 2720503 A 19551011 - WELLMAN JOHN W
- US 3411911 A 19681119 - DYKSTRA THOMAS K
- US 3411912 A 19681119 - DYKSTRA THOMAS K, et al
- US 3287289 A 19661122 - MEYER REAM, et al
- US 3296169 A 19670103 - COREY ALBERT E
- US 3459790 A 19690805 - SMITH DONALD ARTHUR [US]
- US 3142568 A 19640728 - WILLIAM NOTTORF ROBERT
- US 3193386 A 19650706 - WHITE CLAYTON F A
- US 3062674 A 19621106 - HOUCK ROBERT C, et al
- US 3220844 A 19651130 - HOUCK RICHARD F, et al
- US 3411907 A 19681119 - WHITMORE KAY R, et al
- US 3754924 A 19730828 - DE GEEST W, et al
- L. STROEBEL ET AL.: "Photographic Materials And Processes", 1986, BUTTERWORTH PUBLISHERS, STONEHAM
- JAMES: "The Theory of the Photographic Process", 1977, MACMILLAN PUBLISHING CO., pages: 100 - 102
- B.H. CARROLL, G.C. HIGGINS, T.H. JAMES: "Introduction to Photographic Theory", 1980, JOHN WILEY & SONS, NEW YORK
- CHEMICAL AND ENGINEERING NEWS, 4 February 1985 (1985-02-04), pages 26
- "Techniques and Methods of Polymer Evaluation", vol. 1, 1966, MARCEL DEKKER, INC., NEW YORK
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0697619 A2 19960221; EP 0697619 A3 19970205; EP 0697619 B1 20010117; DE 69519901 D1 20010222; DE 69519901 T2 20010719; JP H0862760 A 19960308
DOCDB simple family (application)
EP 95202188 A 19950811; DE 69519901 T 19950811; JP 20879195 A 19950816