| (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 |
| (22) |
Date of filing: 12.02.1988 |
|
| (51) |
International Patent Classification (IPC)4: G03C 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) |
|
| |
|
| (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.