US4385108A
Expired / Lapsed
US
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Method of forming negative dot images
Assignee: Fujifilm Holdings Corp
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Filing: 1980-06-23
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Granted: 1983-05-24
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Expires: 2000-06-23
Abstract
Abstract A method of forming negative dot images which comprises imagewise exposing through a contact screen a silver halide photographilic light-sensitive material of substantially the surface latent image type containing in a silver halide emulsion layer or another hydrophilic colloidal layer (a) a hydroquinone developing agent, and (b) a compound represented by the formula, R 1 NHNHCOR 2 , wherein R 1 is an aryl group which may be substituted, and R 2 is a hydrogen atom, an alkyl group which may be substituted, or an aryl group which may be substituted, and thereafter processing the thus exposed light-sensitive material with an activator aqueous solution having a pH of 11.5 or more.
Inventors
- 👤 Yoshihiro Takagi
- 👤 Yoshitaka Akimura
- 👤 Hiroyuki Mifune
- 👤 Eiichi Okutsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:52
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/42; G03C5/00; G03C5/26; G03C5/262; G03C5/29; G03C5/305
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
139 words
A method of forming a negative dot image having a gamma value of more than 10 which comprises imagewise exposing to light through a contact screen a silver halide photographic light-sensitive material of substantially the surface latent image type which contains in a silver halide emulsion layer or another hydrophilic layer (a) a hydroquinone based developing agent, and (b) a compound represented by the formula (I) as indicated below in the amount of from about 10 -8 to about 5×10 -2 mol/mol Ag and, thereafter, developing the thus exposed light-sensitive material with an activator aqueous solution having a pH of 11.5 or more R.sup.1 NHNHCOR.sup.2 (I) wherein R 1 is an aryl group which may be substituted, and R 2 is a hydrogen atom, an alkyl group which may be substituted, or an aryl group which may be substituted.
Claim 2
Independent Claim
139 words
A method of forming a negative dot image having a gamma value of more than 10 which comprises imagewise exposing to light through a contact screen a silver halide photographic light-sensitive material of substantially the surface latent image type which contains in a silver halide emulsion layer or another hydrophilic layer (a) a hydroquinone based developing agent, and (b) a compound represented by the formula (I) as indicated below in the amount of from about 10 -8 to about 5×10 -2 mol/mol Ag and, thereafter, developing the thus exposed light-sensitive material with an activator aqueous solution having a pH of 11.5 or more R.sup.1 NHNHCOR.sup.2 (I) wherein R 1 is an aryl group which may be substituted, and R 2 is a hydrogen atom, an alkyl group which may be substituted, or an aryl group which may be substituted.
Claim 3
Dependent Claim
16 words
The method of claim 1 wherein R 1 represents a phenyl group which may be substituted.
Claim 4
Dependent Claim
303 words
The method of claim 1 or 2 wherein the aryl group represented by R 1 may be substituted by a member selected from the group consisting of (1) straight chain, branched chain, or cyclic alkyl groups having 1 to 20 carbon atoms, (2) mono or di-cyclic alkyl groups having 1 to 3 carbon atoms in the alkyl moiety, (3) alkoxy groups having 1 to 20 carbon atoms, (4) an amino group or an alkyl-substituted amino group, (5) an aryloxy group, (6) an acylamino group, (7) a group represented by the formula Ar--O--E--CONH, wherein Ar represents an aryl group and E represents an alkylene group, (8) a group represented by the formula A--X--(Y) n -- wherein X represents a divalent connecting residue selected from ##STR12## and Y represents a divalent connecting residue selected from --CONH--, --E--CONH--, --O--E--CONH--, --E--O--E'--CONH--, --S--E--CONH--, --SO 2 NH--, --E--SO 2 NH--, --E--, --E--O--E'--, --E--S--E'--, --NHCONH--, --E--NHCONH-- n is 0 or 1, R 11 is a hydrogen atom, an aliphatic group, or an aromatic group; R 12 is a hydrogen atom or an aliphatic group and R 11 and R 12 may combine to complete a ring; E and E' are divalent saturated or unsaturated aliphatic groups, and A is an alkyl group, an aryl group, an aralkyl group, or a heterocyclic ring which may be condensed with an aromatic ring; and (9) a group represented by the formula ##STR13## wherein Z represents the non-metallic atoms forming a 5- or 6-membered heterocyclic ring, B is a hydrogen atom or a saturated or unsaturated aliphatic group, Y' has the same definition as Y, and n is 0 or 1; and (10) a group of the formula R 3 CONHNH--Ar--Y" wherein R 3 has the same definition as A, Ar represents a divalent aryl group, and Y" has the same definition as Y.
Claim 5
Dependent Claim
23 words
The method of claim 1 wherein R 2 represents a hydrogen atom, a methyl group, or a phenyl group, which may be substituted.
Claim 6
Dependent Claim
12 words
The method of claim 1 wherein R 2 represents a hydrogen atom.
Claim 7
Dependent Claim
11 words
The method of claim 1 wherein said developing agent is hydroquinone.
Claim 8
Dependent Claim
19 words
The method of claim 1 wherein said processing is carried out in the presence of a polyalkylene oxide compound.
Claim 9
Dependent Claim
17 words
The method of claim 7 wherein said polyalkylene oxide compound contains more than 10 alkylene oxide units.
Claim 10
Dependent Claim
20 words
The method of claim 7 wherein said polyalkylene oxide is present in said light-sensitive material or said activator aqueous solution.
Claim 11
Dependent Claim
65 words
The method of claim 1 wherein said activator aqueous solution additionally contains a compound of the formula (III) ##STR14## wherein R 3 is a hydrogen atom or a lower alkyl group, and R 4 is a hydrogen atom, a lower alkyl group, a lower alkenyl group, an alkoxycarbonyl group, a heterocyclic group, a carbamoyl group, a carbazoyl group, an acyl group or a phenyl group.
Claim 12
Dependent Claim
26 words
The method of claim 1, wherein the compound represented by the formula (I) is contained in an amount of from 10 -6 ˜10 -3 mol/mol Ag.
Claim 13
Dependent Claim
23 words
The method of claim 1, wherein the hydroquinone developing agent is contained in an amount of from 0.05 to 5 mol/mol silver halide.
Claim 14
Dependent Claim
23 words
The method of claim 12, wherein the hydroquinone developing agent is contained in an amount of from 0.2 to 3 mol/mol silver halide.
Claim 15
Dependent Claim
29 words
The method of claim 10, wherein said activator contains the compound of formula (III) in an amount of from 10 -4 to 1 mol per liter of the activator.
Claim 16
Dependent Claim
30 words
The method of claim 14, wherein said activator contains the compound of formula (III) in an amount of from 10 -3 to 5×10 -1 mol per liter of the activator.
Claim 17
Dependent Claim
12 words
The method of claim 3, wherein R 2 represents a hydrogen atom.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-05-23 | 1986-11-22 | 1987-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-23 | 1990-11-22 | 1991-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-23 | 1994-11-22 | 1995-05-24 | $7700.00 | Window Closed / Lapsed |