Title:
SCRATCH RESISTANT THICK FLAT PLATY PARTICLES
Document Type and Number:
Japanese Patent JP3195453
Kind Code:
B2
Abstract:
PURPOSE: To reduce the pressure sensitivity and to make the particles superior in speed and properties of particles by using flat platy silver halide particles having a specified aspect ratio and specifying value given by dividing the thickness of each of >50% of the particles by the interval between the twin faces.
CONSTITUTION: In a silver halide emulsion contg. flat platy silver halide particles each having an aspect ratio of <4, value given by diving the thickness of each of >50% of the particles by the interval between the twin faces is regulated to >15. The particles preferably account for >80% of the emulsion and each of the particles preferably has >0.1μm equivalent diameter. The resultant emulsion is preferably used in at least one of the yellow layers of a color negative film. A photographic product less liable to fog is obtd. without increasing graininess as compared with a product using a photographic emulsion contg. particles each having a high aspect radio and a small thickness. The resulant emulsion has satisfactory resistance to pressure fog while maintaining satisfactory graininess.
Inventors:
Stephen Patrick Zatinski
Application Number:
JP3493A
Publication Date:
August 06, 2001
Filing Date:
January 04, 1993
Export Citation:
Assignee:
Eastman Kodak Company
International Classes:
G03C1/035; G03C1/005; (IPC1-7): G03C1/035
Domestic Patent References:
| JP5165133A | ||||
| JP2837A | ||||
| JP5500122A |
Attorney, Agent or Firm:
Shoichi Ui (4 others)