Patent EP0327768A2 successfully refreshed from Google Patents.
EP0327768A2
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Reflection-photographic element and process of preparation thereof
Assignee: Konica Minolta Inc
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Filing: 1988-12-28
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Granted: —
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Expires: 2008-12-28
Abstract
Abstract A reflection-photographic element having a light-sensitive silver halide photographic emulsion layer coated on at least one side of a support that is made of a white polyester film having no more than 20% transmittance for all visible light and which contains titanium dioxide particles having an average size of 0.1 - 0.5 mu m; at least the side of said support which is coated with said emulsion layer has a center-plane-average roughness of no more than 0.12 mu m and said side is substantially free of projections that are at least 1.0 mu m high as measured from the center plane; and a process of preparation thereof.
Inventors
- 👤 Kazuto Kiyohara
- 👤 Hiromitu Araki
- 👤 Toshiaki Yamazaki
- 👤 Ichiya Harada
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 13:35
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/795; G03C1/7954
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
98 words
A reflection-photographic element having a light-sensitive silver halide photographic emulsion layer coated on at least one side of a support that is made of a white polyester film having no more than 20% transmittance for all visible light and which contains titanium dioxide particles having an average size of 0.1 - 0.5 µm, at least the side of said support which is coated with said emulsion layer having a center-plane-average roughness of no more than 0.12 µm and said side being substantially free of projections that are at least 1.0 µm high as measured from the center plane.
Claim 2
Dependent Claim
98 words
A reflection-photographic element having a light-sensitive silver halide photographic emulsion layer coated on at least one side of a support that is made of a white polyester film having no more than 20% transmittance for all visible light and which contains titanium dioxide particles having an average size of 0.1 - 0.5 µm, at least the side of said support which is coated with said emulsion layer having a center-plane-average roughness of no more than 0.12 µm and said side being substantially free of projections that are at least 1.0 µm high as measured from the center plane.
Claim 3
Dependent Claim
16 words
A reflection-photographic element according to claim 1 wherein said titanium dioxide is of the anatase type.
Claim 4
Dependent Claim
22 words
A reflection- photographic element according to claim 1 or 2 wherein said titanium dioxide particles have been subjected to a surface treatment.
Claim 5
Dependent Claim
105 words
A reflection-photographic element according to claim 3 wherein said surface treatment is an organic treatment and/or an organic treatment, said inorganic treatment involving depositing one or more inorganic compounds on the surface of said titanium dioxide particles that are selected from among hydroxides, hydrated oxides, phosphates, basic sulfates of metals such as Al, Ce, Mg, Ti, Sb, Si, Sn, Zn and Zr, and said organic treatment involving allowing one or more organic compounds to be adsorbed on the surface of titanium dioxide particles that are selected from among metal salts of aliphatic acids, coupling agents, alcohols, amines, siloxane polymers, ester compounds, and phosphoric acid compounds.
Claim 6
Dependent Claim
36 words
A reflection-photographic element according to claim 1 wherein said polyester film is prepared from a composition that is obtained by mixing a polyester with titanium dioxide that has been preliminarily subjected to classification or wet grinding.
Claim 7
Dependent Claim
16 words
A reflection-photographic element according to claim 5 wherein said classification is conducted by a wet process.
Claim 8
Dependent Claim
16 words
A reflection-photographic element according to claim 6 wherein said wet classification is conducted by gravitational settlement.
Claim 9
Dependent Claim
25 words
A reflection-photographic element according to claim 1 wherein said polyester is a polymer of the condensation product of an aromatic dicarboxylic acid and a glycol.
Claim 10
Dependent Claim
25 words
A reflection-photographic element according to claim 8 wherein said polymer of the condensation product is polyethylene terephthalate, polyethylene-2,6-dinaphthalate, polypropylene terephthalate, polybutylene terephthalate or copolymers thereof.
Claim 11
Dependent Claim
29 words
A reflection-photographic element according to claim 1 or 5 wherein 10 - 50 parts by weight of titanium dioxide is incorporated in 100 parts by weight of the polyester.
Claim 12
Dependent Claim
27 words
A reflection-photographic element according to claim 1 wherein said polyester film has been stretched for a draw ratio of 4 - 16 on the basis of area.
Claim 13
Dependent Claim
18 words
A reflection-photographic element according to claim 11 wherein said polyester film has been heat-set and heat-relaxed after stretching.
Claim 14
Dependent Claim
18 words
A reflection-photographic element according to claim 1 wherein said support has a thickness of 50 - 300 µm.
Claim 15
Dependent Claim
20 words
A reflection-photographic element according to claim 1 wherein said titanium dioxide particles have a size of less than 3 µm.
Claim 16
Dependent Claim
63 words
A reflection-photographic element comprising a light-sensitive silver halide photographic emulsion layer coated on at least one side of a support that is made of a white polyester film having no more than 20% transmittance for all visible light and which contains titanium dioxide particles having an average size of 0.1 - 0.5 µm and having substantially a size of less than 3 µm.
Claim 17
Dependent Claim
63 words
A reflection-photographic element comprising a light-sensitive silver halide photographic emulsion layer coated on at least one side of a support that is made of a white polyester film having no more than 20% transmittance for all visible light and which contains titanium dioxide particles having an average size of 0.1 - 0.5 µm and having substantially a size of less than 3 µm.
Claim 18
Dependent Claim
19 words
A reflection-photographic element according to claim 15 wherein titanium dioxide particles have a size of less than 2 µm.
Claim 19
Dependent Claim
19 words
A reflection-photographic element according to claim 15 wherein titanium dioxide particles have a size of less than 1 µm.
Claim 20
Dependent Claim
58 words
A process of preparation of a white polyester film comprising, at least one of classificaton and wet grinding of titanium dioxide particles for their average size to be 0.1 - 0.5 µm and their size less than 3 µm, kneading polyester with said titanium dioxide particles, extruding the composition, and stretching the extruded composition to be a film.
Claim 21
Dependent Claim
58 words
A process of preparation of a white polyester film comprising, at least one of classificaton and wet grinding of titanium dioxide particles for their average size to be 0.1 - 0.5 µm and their size less than 3 µm, kneading polyester with said titanium dioxide particles, extruding the composition, and stretching the extruded composition to be a film.
Claim 22
Dependent Claim
19 words
A process of preparation of a white polyester film according to claim 15 wherein the stretching is biaxial drawing.
Claim 23
Dependent Claim
81 words
A support comprising a white polyester film having no more than 20% transmittance for all visible light and which contains titanium dioxide particles having an average size of 0.1 - 0.5 µm, at least the side of said support which is coated with a light-sensitive silver halide photographic emulsion layer having a center-plane-average roughness of no more than 0.12 µm and said side being substantially free of projections that are at least 1.0 µm high as measured from the center plane.
Claim 24
Dependent Claim
81 words
A support comprising a white polyester film having no more than 20% transmittance for all visible light and which contains titanium dioxide particles having an average size of 0.1 - 0.5 µm, at least the side of said support which is coated with a light-sensitive silver halide photographic emulsion layer having a center-plane-average roughness of no more than 0.12 µm and said side being substantially free of projections that are at least 1.0 µm high as measured from the center plane.
References Cited (Backward Citations)
No citation records indexed.
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