Azo dyes for photographic silver dye bleach material
AssigneeIlford Limited
InventorsKurt Baettig, Gerald C. Jan
Life of this patent
Estimating the term…
Abstract
Azo dyes of the formula ##STR1## where X is alkyl or alkoxy each of 1 to 4 carbon atoms or halogen, X' is hydrogen, alkyl or alkoxy each of 1 to 4 carbon atoms or halogen, Y and Y' are independently of each other hydrogen or halogen, Z is hydrogen, alkyl or alkoxy or alkylthio each of 1 to 4 carbon atoms, or halogen, M is a 1-, 2- or 3-valent metal cation, ammonium or an organic ammonium compound, m is 1, 2 or 3 and n is 2 to 10, are suitable for use as image dyes in photographic silver dye bleach materials. The dyes of the invention can also be used to dye textile materials.
Claims12
A photographic element containing photographic silver dye bleach materials comprising an azo dye of the formula ##STR101## where X is alkyl or alkoxy each of 1 to 4 carbon atoms or halogen, X' is hydrogen, alkyl or alkoxy each of 1 to 4 carbon atoms or halogen, Y and Y' are independently of each other hydrogen or halogen, Z is hydrogen, alkyl or alkoxy or alkylthio each of 1 to 4 carbon atoms, or halogen, M is a 1-, 2- or 3-valent metal cation or ammonium, m is 1, 2 or 3 and n is 2 to 10, said azo dye functioning as an image dye in said photographic silver dye bleach materials.
A photographic element containing photographic silver dye bleach materials and comprising
- a photographic support layer,
- a plurality of layers on said photographic support layer,
- at least one of said layers comprising an azo image dye of the formula ##STR102## where X is alkyl or alkoxy each of 1 to 4 carbon atoms or halogen, X' is hydrogen, alkyl or alkoxy each of 1 to 4 carbon atoms or halogen, Y and Y' are independently of each other hydrogen or halogen, Z is hydrogen, alkyl or alkoxy or alkylthio each of 1 to 4 carbon atoms, or halogen, M is a 1-, 2- or 3-valent metal cation or ammonium, m is 1, 2 or 3 and n is 2 to 10, and said azo image dye containing layer having high scratch resistance.
Dependencies are inferred from the claim text.