(19)
(11) EP 0 282 171 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
19.07.1989 Bulletin 1989/29

(43) Date of publication A2:
14.09.1988 Bulletin 1988/37

(21) Application number: 88301203.1

(22) Date of filing: 12.02.1988
(51) International Patent Classification (IPC)4G03C 1/76
(84) Designated Contracting States:
BE CH DE GB IT LI NL

(30) Priority: 09.03.1987 US 23486

(71) Applicant: MINNESOTA MINING AND MANUFACTURING COMPANY
St. Paul, Minnesota 55101 (US)

(72) Inventor:
  • Shor, Steven M. c/o Minnesota Mining and
    St. Paul Minnesota 55133-3427 (US)

(74) Representative: Bowman, Paul Alan et al
LLOYD WISE, TREGEAR & CO., Commonwealth House, 1-19 New Oxford Street
London WC1A 1LW
London WC1A 1LW (GB)


(56) References cited: : 
   
       


    (54) Improved imaging surfaces


    (57) A photographic element comprising at least one silver halide photographic emulsion in a hydrophilic colloidal binder on a substrate and a surface matting layer over said at least one emulsion, said matting agent layer comprising a binder having at least two different types of non-developmentally disolvable particles therein, one type of particle comprising a matting agent having an average particle size of between 1 and 10 microns in a coating weight of between 0.015 and 0.15 g/m², and the second type of particle comprising buoying particles having an average particle size of between 0.20 and 0.75 microns in a coating weight of between 0.2 and 0.7 g/m².
    The combinations of particles having different sizes are used to improve drawdown, reduce the starry night effect, and maintain the sensitometric quality of photographic film materials.





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