US4138256A — Method of processing photographic silver dye blea…

Claim 1

Independent Claim 319 words

A method of processing imagewise exposed photographic silver dye bleach materials involving the process steps (1) silver developing, (2) dye bleaching, (3) silver bleaching, (4) fixing, it being possible to combine process step (3) with at least one of the process steps (2) and (4) in a single treatment step, which method comprises using in at least one of the steps (2), (3) or (4) a water-soluble tertiary phosphine of the formula ##STR31## is used as silver ligand, wherein W is a radical of the formula --C r H 2r CN or --C 2 H 2r NO 2 , in whichr is an integer from 1 to 25, a pyridine, pyrazine or triazine radical or a radical of the formulae ##STR32## wherein M.sup.⊕ is a cation and each of R 1 and R 2 is independently a hydrogen atom or an alkyl group of 1 to 4 carbon atoms, X is ##STR33## or alkyl-halogen, wherein the alkyl moiety contains 1 to 15 carbon atoms, M.sup.⊕ is a cation, each of R 3 , R 4 and R 5 is independently a hydrogen atom or an alkyl group of 1 to 4 carbon atoms, U is an alkyl group of 1 to 4 carbon atoms and n is an integer from 1 to 5, and Y is a radical of the formula ##STR34## wherein n is an integer from 2 to 5, r is an integer of 1 to 25 and M.sup.⊕ is a cation, each of R 1 , Q 1 and T 1 is independently a hydrogen atom or an alkyl group of 1 to 4 carbon atoms, Q 1 and T 1 together with the nitrogen atom to which they are attached can also form one of the radicals of the formulae ##STR35## and X and Y together are --CH 2 --CH 2 --NR 1 --CH 2 --CH 2 , wherein R 1 has the indicated meaning.

Claim 2

Independent Claim 319 words

A method of processing imagewise exposed photographic silver dye bleach materials involving the process steps (1) silver developing, (2) dye bleaching, (3) silver bleaching, (4) fixing, it being possible to combine process step (3) with at least one of the process steps (2) and (4) in a single treatment step, which method comprises using in at least one of the steps (2), (3) or (4) a water-soluble tertiary phosphine of the formula ##STR31## is used as silver ligand, wherein W is a radical of the formula --C r H 2r CN or --C 2 H 2r NO 2 , in whichr is an integer from 1 to 25, a pyridine, pyrazine or triazine radical or a radical of the formulae ##STR32## wherein M.sup.⊕ is a cation and each of R 1 and R 2 is independently a hydrogen atom or an alkyl group of 1 to 4 carbon atoms, X is ##STR33## or alkyl-halogen, wherein the alkyl moiety contains 1 to 15 carbon atoms, M.sup.⊕ is a cation, each of R 3 , R 4 and R 5 is independently a hydrogen atom or an alkyl group of 1 to 4 carbon atoms, U is an alkyl group of 1 to 4 carbon atoms and n is an integer from 1 to 5, and Y is a radical of the formula ##STR34## wherein n is an integer from 2 to 5, r is an integer of 1 to 25 and M.sup.⊕ is a cation, each of R 1 , Q 1 and T 1 is independently a hydrogen atom or an alkyl group of 1 to 4 carbon atoms, Q 1 and T 1 together with the nitrogen atom to which they are attached can also form one of the radicals of the formulae ##STR35## and X and Y together are --CH 2 --CH 2 --NR 1 --CH 2 --CH 2 , wherein R 1 has the indicated meaning.

Claim 3

Dependent Claim 133 words

A method according to claim 1 wherein the silver ligand is a phosphine of the formula ##STR36## wherein W 1 and X 1 are as defined in claim 3 and Y 1 is ##STR37## wherein n is an integer from 2 to 4, r 1 is an integer from 1 to 15 and M.sup.⊕ is a cation and each of R 1 , Q 1 and T 1 independently represents a hydrogen atom or an alkyl group of 1 to 4 carbon atoms, Q 1 and T 1 together can be a radical of the formula ##STR38## and X 1 and Y 1 together with the nitrogen atom to which they are attached can be --CH 2 --CH 2 --NR 1 --CH 2 --CH 2 --, wherein R 1 has the indicated meaning.

Claim 4

Dependent Claim 133 words

A method according to claim 1, wherein the silver ligand is a phosphine of the formula ##STR39## wherein W 1 and X 1 are as defined in claim 1 and Y 2 is ##STR40## wherein n 1 is an integer from 1 to 3, r 2 is an integer from 1 to 4 and M.sup.⊕ is a cation, each of R 1 , Q 1 and T 1 independently is a hydrogen atom or an alkyl group of 1 to 4 carbon atoms, Q 1 and T 1 together with the nitrogen atom to which they are attached can be a radical of the formula ##STR41## and X 1 and Y 2 together can be --CH 2 --CH 2 --NR 1 --CH 2 --CH 2 --, wherein R 1 has the indicated meaning.

Claim 5

Dependent Claim 66 words

A process according to claim 3, wherein the silver ligand is a phosphine of the formula ##STR42## wherein W 1 and X 1 are as defined in claim 1 and Y 3 is ##STR43## wherein M.sup.⊕ is a cation and X 1 and Y 3 together can be --CH 2 --CH 2 --NR 1 --CH 2 --CH 2 --, wherein R 1 has the indicated meaning.

Claim 6

Dependent Claim 118 words

A method according to claim 4, wherein the silver ligand is a phosphine of the formula ##STR44## wherein Y 3 is as defined in claim 6, W 2 is --CH 2 --CH 2 --CN, ##STR45## wherein each of R 1 and R 2 independently is a hydrogen atom or an alkyl group of 1 to 4 carbon atoms, alkyl is an alkylene group of 1 to 4 carbon atoms, n is an integer from 1 to 5, M.sup.⊕ is a cation and halogen is in particular a chlorine or bromine atom, and X 2 and Y 3 together can be --CH 2 --CH 2 --NR 1 --CH 2 --CH 2 --, wherein R 1 has the indicated meaning.

Claim 7

Dependent Claim 101 words

A method according to claim 5, wherein the silver ligand is a phosphine of the formula ##STR46## wherein Y 3 is as defined in claim 6, W 3 is --CH 2 --CH 2 --CN or ##STR47## wherein M.sup.⊕ is a cation, U is an alkyl group of 1 to 4 carbon atoms, n 1 is a integer from 2 or 3 and k is an integer from 2 to 4, R 1 and R 2 are as defined in claim 7 and X 3 and Y 3 together can be --(CH 2 ) 2 --N(CH 3 )(CH 2 ) 2 --.

Claim 8

Dependent Claim 59 words

A method according to claim 6, wherein the silver ligand is a phosphine of the formula ##STR48## wherein W 3 and Y 3 are as defined in claim 6 and X 4 is ##STR49## wherein M.sup.⊕ is a cation and X 4 and Y 3 together can be --(CH 2 ) 2 --N(CH 3 )--(CH 2 ) 2 --.

Claim 9

Dependent Claim 109 words

A method according to claim 7, wherein the silver ligand is a phosphine of the formula ##STR50## wherein W 3 is as defined in claim 6, Y 4 is --(CH 2 ) 2 --SO 3 .sup.⊖ M.sup.⊕, --(CH 2 ) 3 --SO 3 .sup.⊖ M.sup.⊕, --(CH 2 ) 4 --SO 3 .sup.⊖ M .sup.⊕, --CH 2 N(C 2 H 5 ) 2 or --(CH 2 ) 2 --OCH 3 , X 5 --CH 2 --CH 2 --CN or --(CH 2 ) 2 --OCH 3 and M.sup.⊕ is a cation and X 5 and Y 4 together can be --(CH 2 ) 2 --N(CH 3 )(CH 2 ) 2 --.

Claim 10

Dependent Claim 60 words

A method according to claim 1, wherein a preparation which contains (a) a strong acid, (b) a water-soluble iodide, (c) a dye bleach catalyst in an amount of 0.5 to 5 g/l, (d) an organic water-soluble oxidant, (e) an antioxidant, and (f) a water-soluble tertiary phosphine, is used for the silver bleaching (3), optionally combined with the dye bleaching (2).

Claim 11

Dependent Claim 58 words

A method according to claim 1, wherein a bleach-fixing preparation which contains (a) a strong acid, (b) an organic water-soluble oxidant, (c) one or more of the ligands: thiocyanide, chloride, bromide, iodide and thiourea, (d) optionally a dye bleach catalyst, and (e) a water-soluble tertiary phosphine, is used for the silver bleaching (3) combined with the fixing (4).

Claim 12

Dependent Claim 52 words

A method according to claim 1, wherein a preparation which contains (a) a strong acid, (b) a water-soluble organic oxidant, (c) a catalyst, (d) optionally a water-soluble iodide, and (e) a water-soluble tertiary phosphine, is used for simultaneously carrying out the process steps dye bleaching (2), silver bleaching (3) and fixing (4).

Claim 13

Dependent Claim 221 words

A method according to claim 1, in which a photographic material is used which contains, in each of at least two layers, a dye which can be bleached imagewise and whose absorption maximum corresponds to one of the primary colours red, green and blue, with a silver halide emulsion layer sensitive to a particular spectral region being assigned to each dye, and in this material, (a) a silver halide emulsion layer consisting at least partially of silver iodide is assigned to the dye whose undesired parasitic colour density is to be compensated, (b) in a further layer, at least a second dye whose main colour density corresponds to a parasitic colour density, requiring compensation, of the first dye and a silver halide emulsion which contains no iodide ions are present, (c) a further layer, which is adjacent to the layer containing the second dye, contains colloidal nuclei which are capable of depositing metallic silver from soluble silver complexes, (d) a separating layer is present between the layer containing the nuclei and the dye layer the parasitic colour density of which is to be compensated, and the silver developing bath with which the material is treated contains a ligand which is able to produce water-soluble silver complexes which are capable of diffusion, wherein at least one processing bath contains water-soluble tertiary phosphine.

Claim 14

Dependent Claim 16 words

A process of claim 8 wherein the silver ligand is a phosphine of the formula ##STR51##

Claim 15

Dependent Claim 24 words

Preparation suitable for carrying out the processing method according to claim 1, which contains as silver ligand a water-soluble tertiary organic phosphine in solution.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1982-02-05	1982-08-07	1983-02-06	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1986-02-05	1986-08-07	1987-02-06	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1990-02-05	1990-08-07	1991-02-06	$7700.00	Window Closed / Lapsed

Method of processing photographic silver dye bleach materials

Abstract

Inventors

Bibliographic Details

Claims Analysis

References Cited (Backward Citations)

USPTO Annuity & Maintenance Windows

Assigned Categories & Tags

Assign Category Tag