EP0101295A2
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EP
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Radiographic image forming process
Assignee: Konica Minolta Inc
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Filing: 1983-08-09
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Granted: —
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Expires: 2003-08-09
Abstract
Abstract A radiographic image forming process comprises treating a negative type-silver halide photegraphic light-sensitive material comprising a support bearing on each side thereof a constituent layer containing, a) light-sensitive silver halide particles, b) metallic salt particles whose surfaces are retarded to be soluble by a dissolution retarder while said metallic salt particles themselves are more readily soluble then said light-sensitive silver halide particles, and which is non-light-sensitive, and c) physical development nuclei, with a processing solution after exposing imagewise to radiation rays in combination with a fluorescent intensifying screen. Problems arising from cross-over phenomena, i.e. images on one side produced by light transmission through the support, can be avoided by incorporating within the constituent layers; d) at least one water-soluble dye whose maximum absorption in an aqueous solution is from 400 to 600 nm, or a compound comprising said water-soluble dye coupled to a non-diffusive mordant, and employing in the processing solution: i) at least one reducing agent, and ii) at least one substance capable of dissolving the undermentioned metallic salt particles.
Inventors
- 👤 Eiichi Sakamoto
- 👤 Mikio Kawasaki
- 👤 Kouji Ono
- 👤 Kakujulo Fukuoji
- 👤 Noboru Fujimori
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 03:35
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/76; G03C1/825; G03C1/83; G03C5/00; G03C5/16; G03C8/00; G03C8/02; G03C8/04; Y; Y10; Y10S; Y10S430/00; Y10S430/167; Y10S430/168
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
154 words
A radiographic image forming process comprising treating a negative type silver halide photographic light-sensitive material comprising a support bearing on each side thereof a constituent layer containing, a) light-sensitive silver halide particles, b) metallic salt particles whose surfaces are retarded to be soluble by a dissolution retarder while said metallic salt particles themselves are more readily soluble than said light-sensitive silver halide particles, and which is substantially non-light-sensitive, and c) physical development nuclei with a processing solution after imagewise exposure to radiation in combination with a fluorescent intensifying screen; characterized in that said light-sensitive material additionally comprises d) at least one water-soluble dye whose maximum absorption in an aqueous solution is from 400 to 600 nm, or a compound comprising said water-soluble dye coupled to a non-diffusive mordant, and in that said processing solution comprises i) at least one reducing agent, and ii) at least one substance capable of dissolving the metallic salt particles.
Claim 2
Dependent Claim
154 words
A radiographic image forming process comprising treating a negative type silver halide photographic light-sensitive material comprising a support bearing on each side thereof a constituent layer containing, a) light-sensitive silver halide particles, b) metallic salt particles whose surfaces are retarded to be soluble by a dissolution retarder while said metallic salt particles themselves are more readily soluble than said light-sensitive silver halide particles, and which is substantially non-light-sensitive, and c) physical development nuclei with a processing solution after imagewise exposure to radiation in combination with a fluorescent intensifying screen; characterized in that said light-sensitive material additionally comprises d) at least one water-soluble dye whose maximum absorption in an aqueous solution is from 400 to 600 nm, or a compound comprising said water-soluble dye coupled to a non-diffusive mordant, and in that said processing solution comprises i) at least one reducing agent, and ii) at least one substance capable of dissolving the metallic salt particles.
Claim 3
Dependent Claim
74 words
A process as claimed in Claim 1, characterized in that said water-soluble dye has the formula [IJ. wherein, R I and R 2 each represent a straight or branched chain alkyl group having 1 to 7 carbon atoms, a carboxyl group, an alkoxycarbonyl group, an alkylaminocarbonyl group, an amino group, an acylamino group, or a trifluoromethyl group; M represents hydrogen, an alkali metal atom, or an ammonium group; and n is 1 or 3.
Claim 4
Dependent Claim
59 words
A process as claimed in Claim 1, characterized in that said non-diffusive mordant is a polymer or a copolymer having the formula [II], wherein, Q represents a group of atoms necessary to complete, together with an N atom, an imidazole ring; X is an acid radical, an acid anion or a halide anion; and n is 0 or 1.
Claim 5
Dependent Claim
78 words
A process as claimed in Claim 1, characterized in that said non-diffusive mordant is a polymer or a copolymer having the formula [III], wherein, R 1 , R 2 and R 3 each represent an alkyl or substituted alkyl group having 1 to 8 carbon atoms; L 1 represents -CONH- or ; L 2 represents an alkylene or arylene group; p and q each represents 0 or 1; and X represents an acid anion, or a halide anion.
Claim 6
Dependent Claim
43 words
A process as claimed in Claim 1, characterized in that said non-diffusive mordant is a polymer or a copolymer having the formula [IV] , wherein, A represents X represents an acid radical; ℓ is 1 or 2; and m is 0 or 1.
Claim 7
Dependent Claim
53 words
A process as claimed in any of Claims 1 to 5, characterized in that a constituent layer containing at least one water-soluble dye or the coupled product of at least one water-soluble dye and said non-diffusive mordant is used as a coated layer brought into face to face contact with said transparent support.
Claim 8
Dependent Claim
76 words
A process as claimed in any of Claims I to 5, characterized in that a triple-layered negative type silver halide photographic light-sensitive material is constituted by coating, in order from the support side, a constituent layer containing a coupled product of said water-soluble dye and said non-diffusive mordant; another constituent layer containing a mixture of said metallic salt particles and said physical development nuclei; and a further constituent layer containing only said light-sensitive silver halide particles.
Claim 9
Dependent Claim
63 words
A process as claimed in any of Claims 1 to 5, characterized in that a double-layered negative type silver halide photographic light-sensitive material is constituted by coating, in order from the support side, a constituent layer containing a mixture of said metallic salt particles, said physical development nuclei and said water-soluble dyes, and another constituent layer containing only said light-sensitive silver halide particles.
Claim 10
Dependent Claim
23 words
A process as claimed in any of Claims 1 to= 8, characterized in that said reducing agent is a silver halide developing agent.
Claim 11
Dependent Claim
70 words
A process as claimed in any of Claims 1 to 9, characterized in that wherein said substance capable of dissolving said metallic salt particles is either a substance substantially incapable of dissolving said light-sensitive silver halide or a substance capable of dissolving metallic salt particles whose solubility is different from that of said light-sensitive silver halide, the concentration of the substance being insufficient substantially to dissolve said light-sensitive silver halide.
Claim 12
Dependent Claim
30 words
A process as claimed in Claim 10, characterized in that said substance capable of dissolving metallic salt particles is a sulfite; thiosulfate; cyanate; thiocyanate; amino acid, thiourea, or a thioether.
References Cited (Backward Citations)
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