Yellow-dye-forming photographic developing composition
AssigneeEastman Kodak Company
InventorCarl R. Cappel
Life of this patent
Estimating the term…
Abstract
A yellow-dye-forming photographic developing composition having improved stability comprises a haloacetanilide coupler, such as alpha-pivalyl-alpha-(4-carboxyphenoxy)-2,4-dichloroacetanilide, an N-alkyl-N-alkoxyalkyl-p-phenylenediamine developing agent, such as 4-amino-N-ethyl-N-(2-methoxyethyl)-m-toluidine di-p-toluene sulfonate, and a 4,4-disubstituted-1-aryl-3-pyrazolidinone, such as 4,4-dimethyl-1-phenyl-3-pyrazolidinone.
Claims7
A yellow-dye-forming photographic developing composition comprising
- (1) a haloacetanilide coupler of the formula ##STR8## wherein R is a branched alkyl group of 3 to 6 carbon atoms, X is Cl or Br, Y is X, hydrogen or alkyl of 1 to 8 carbon atoms, and A and B differ and are either H or COOM where M is a photographically inactive cation or a methyl or ethyl group;
- (2) an N-alkyl-N-alkoxyalkyl-p-phenylene-diamine develoing agent of the formula ##STR9## wherein n is an integer having a value of from 2 to 4, R.sup.1 is alkyl of from 1 to 4 carbon atoms, and R.sup.2 is alkyl of from 1 to 4 carbon atoms or alkoxy of from 1 to 4 carbon atoms;
- and (3) a 4,4-disubstituted-1-aryl-3-pyrazolidinone balancing developing agent of the formula ##STR10## wherein R.sup.3 and R.sup.4 are the same or different and each is alkyl of 1 to 6 carbon atoms or hydroxyalkyl of 1 to 6 carbon atoms, and R.sup.5 is hydrogen, halogen, alkyl of 1 to 6 carbon atoms, or alkoxy of 1 to 6 carbon atoms.
A yellow-dye-forming photographic developing composition comprising 4-amino-N-ethyl-N-(2-methoxyethyl)-m-toluidine di-p-toluene sulfonate, alpha-pivalyl-alpha-(4-carboxyphenoxy)-2,4-dichloroacetanilide, and 4,4-dimethyl-1-phenyl-3-pyrazolidinone.
A yellow-dye-forming photographic developing composition comprising 4-amino-N-ethyl-N-(2-methoxyethyl)-m-toluidine di-p-toluene sulfonate, alpha-pivalyl-alpha-(4-carboxyphenoxy)-2,4-dichloroacetanilide, and 4-hydroxymethyl-4-methyl-1-phenyl-3-pyrazolidinone.
An aqueous alkaline yellow-dye-forming photographic developing solution comprising from about 1 to about 4 grams per liter of a haloacetanilide coupler of the formula ##STR11## wherein R is a branched alkyl group of 3 to 6 carbon atoms, X is Cl or Br, Y is X, hydrogen or alkyl of 1 to 8 carbon atoms, and A and B differ and are either H or COOM where M is a photographically inactive cation or a methyl or ethyl group;
- from about 1 to about 4 grams per liter of an N-alkyl-N-alkoxyalkyl-p-phenylenediamine developing agent of the formula ##STR12## wherein n is an integer having a value of from 2 to 4, R.sup.1 is alkyl of from 1 to 4, R.sup.1 is alkyl of from 1 to 4 carbon atoms, and R.sup.2 is alkyl of from 1 to 4 carbon atoms or alkoxy of from 1 to 4 carbon atoms;
- and from about 0.2 to about 0.8 grams per liter of a 4,4-disubstituted-1-aryl-3-pyrazolidinone balancing developing agent of the formula ##STR13## wherein R.sup.3 and R.sup.4 are the same or different and each is alkyl of 1 to 6 carbon atoms or hydroxyalkyl of 1 to 6 carbon atoms, and R.sup.5 is hydrogen, halogen, alkyl of 1 to 6 carbon atoms, or alkoxy of 1 to 6 carbon atoms.
In a method of reversal color processing of a photographic element in which said element is developed in a yellow-dye-forming photographic developing solution, the improvement wherein said solution comprises
- (1) a haloacetanilide coupler of the formula ##STR14## wherein R is a branched alkyl group of 3 to 6 carbon atoms, X is Cl or Br, Y is X, hydrogen or alkyl of 1 to 8 carbon atoms, and A and B differ and are either H or COOM where M is a photographically inactive cation or a methyl or ethyl group;
- (2) an N-alkyl-N-alkoxyalkyl-p-phenylenediamine developing agent of the formula ##STR15## wherein n is an integer having a value of from 2 to 4, R.sup.1 is alkyl of from 1 to 4 carbon atoms, and R.sup.2 is alkyl of from 1 to 4 carbon atoms or alkoxy of from 1 to 4 carbon atoms;
- and (3) a 4,4-disubstituted-1-aryl-3-pyrazolidinone balancing developing agent of the formula ##STR16## wherein R.sup.3 and R.sup.4 are the same or different and each is alkyl of 1 to 6 carbon atoms or hydroxyalkyl of 1 to 6 carbon atoms, and R.sup.5 is hydrogen, halogen, alkyl of 1 to 6 carbon atoms, or alkoxy of 1 to 6 carbon atoms.
Dependencies are inferred from the claim text.