EP 0699950 A1 19960306 - Ultrathin tabular grain emulsions with novel dopant management
Title (en)
Ultrathin tabular grain emulsions with novel dopant management
Title (de)
Emulsionen mit ultradünnen tafelförmigen Körnern und neuer Behandlung von Dotiermitteln
Title (fr)
Emulsions aux grains tabulaires ultraminces avec gestion nouvelle de dopants
Publication
Application
Priority
- US 29743094 A 19940826
- US 29656294 A 19940826
- US 29719594 A 19940826
- US 35925194 A 19941219
- US 44148995 A 19950515
Abstract (en)
A chemically and spectrally sensitized ultra-thin tabular grain emulsion is disclosed including tabular grains (a) having ä111ü major faces, (b) containing greater than 70 mole percent bromide, based on silver, (c) accounting for greater than 90 percent of total grain projected area, (d) exhibiting an average equivalent circular diameter of at least 0.7 mu m, and (e) exhibiting an average thickness of less than 0.07 mu m. It has been observed that increased speed and contrast as well as improvements in speed-granularity relationships can be realized when the surface chemical sensitization sites include epitaxially deposited silver halide protrusions forming epitaxial junctions with the tabular grains, the protrusions (a) being located on up to 50 percent of the surface area of the tabular grains, (b) having a higher overall solubility than at least that portion of the tabular grains forming epitaxial junctions with the protrusions, and (c) forming a face centered cubic crystal lattice. In further improving photographic performance by incorporating a photographically useful dopants, it has been observed that iridium placed in the ultrathin tabular grains and a shallow electron trapping site providing dopant placed, in the silver halide protrusions can together increase photographic speed and reduce high intensity reciprocity failure.
IPC 1-7
IPC 8 full level
G03C 1/035 (2006.01); G03C 1/005 (2006.01); G03C 1/08 (2006.01); G03C 1/46 (2006.01)
CPC (source: EP)
G03C 1/0051 (2013.01); G03C 1/08 (2013.01); G03C 1/46 (2013.01)
Citation (applicant)
- US 4439520 A 19840327 - KOFRON JAMES T [US], et al
- US 4435501 A 19840306 - MASKASKY JOE E [US]
- US 5250403 A 19931005 - ANTONIADES MICHAEL G [US], et al
- US 5051344 A 19910924 - KUNO KOICHI [JP]
- EP 0362699 A2 19900411 - EASTMAN KODAK CO [US]
- US 5372927 A 19941213 - DELTON MARY H [US]
- US 5061609 A 19911029 - PIGGIN ROGER H [GB], et al
- US 5061616 A 19911029 - PIGGIN ROGER H [GB], et al
- US 4433048 A 19840221 - SOLBERG JOHN C [US], et al
- US 4672027 A 19870609 - DAUBENDIEK RICHARD L [US], et al
- US 4713320 A 19871215 - MASKASKY JOE E [US]
- US 4942120 A 19900717 - KING SCOTT A [US], et al
- EP 0434012 A1 19910626 - FUJI PHOTO FILM CO LTD [JP]
- US 3901711 A 19750826 - IWAOSA KATSUAKI, et al
- US 4828962 A 19890509 - GRZESKOWIAK NICHOLAS E [GB], et al
- US 5229263 A 19930720 - YOSHIDA TETSUO [JP], et al
- US 4902611 A 19900220 - LEUBNER INGO H [US], et al
- US 4933272 A 19900612 - MCDUGLE WOODROW G [US], et al
- US 4981781 A 19910101 - MCDUGLE WOODROW G [US], et al
- US 5037732 A 19910806 - MCDUGLE WOODROW G [US], et al
- US 4937180 A 19900626 - MARCHETTI ALFRED P [US], et al
- US 5360712 A 19941101 - OLM MYRA T [US], et al
- US 5011767 A 19910430 - YAMASHITA SEIJI [JP], et al
- US 3271157 A 19660906 - MCBRIDE CLARENCE E
- US 3574628 A 19710413 - JONES EVAN T
- US 3737313 A 19730605 - ROSECRANTS W, et al
- US 2222264 A 19401119 - NIETZ ADOLPH H, et al
- US 2448534 A 19480907 - LOWE WESLEY G, et al
- US 3320069 A 19670516 - ILLINGSWORTH BERNARD D
- US 4749646 A 19880607 - HERZ ARTHUR H [US], et al
- US 4810626 A 19890307 - BURGMAIER GEORGE J [US], et al
- US 5049485 A 19910917 - DEATON JOSEPH C [US]
- "Chemical and Engineering News", 4 February 1985, AMERICAN CHEMICAL SOCIETY
- "Research Disclosure", KENNETH MASON PUBLICATIONS, LTD.
- BUHR ET AL., RESEARCH DISCLOSURE, vol. 253, May 1985 (1985-05-01)
- RESEARCH DISCLOSURE, vol. 308, December 1989 (1989-12-01)
- B. H. CARROLL: "Iridium Sensitization: A Literature Review", PHOTOGRAPHIC SCIENCE AND ENGINEERING, vol. 24, no. 6, November 1980 (1980-11-01), pages 265 - 267, XP008054643
- RESEARCH DISCLOSURE, vol. 365, September 1994 (1994-09-01)
- "The Theory of the Photographic Process", 1966, MACMILLAN
- JAMES E. HUHEEY, INORGANIC CHEMISTRY: PRINCIPLES OF STRUCTURE AND REACTIVITY, 1972
- C. K. JORGENSEN: "Absorption Spectra and Chemical Bonding in Complexes", 1962, PERGAMON PRESS
- "SPSE Handbook of Photographic Science and Engineering", pages: 934 - 939
- M. A. KRISS: "The Theory of the Photographic Process", 1977, MACMILLAN, pages: 625
- J. I. GOLDSTEIN; D. B. WILLIAMS: "Scanning Electron Microscopy/1977", vol. 1, March 1977, IIT RESEARCH INSTITUTE, article "X-ray Analysis in the TEM/STEM", pages: 651
Citation (search report)
- [Y] US 4814264 A 19890321 - KISHIDA SEIICHIRO [JP], et al
- [Y] EP 0498302 A1 19920812 - EASTMAN KODAK CO [US]
- [Y] EP 0507702 A1 19921007 - EASTMAN KODAK CO [US]
- [Y] EP 0515894 A1 19921202 - EASTMAN KODAK CO [US]
- [Y] US 5166044 A 19921124 - ASAMI MASAHIRO [JP]
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0699950 A1 19960306; EP 0699950 B1 20000524; DE 69517109 D1 20000629; DE 69517109 T2 20010201; JP H08171163 A 19960702
DOCDB simple family (application)
EP 95420240 A 19950821; DE 69517109 T 19950821; JP 21782295 A 19950825