Diazo copying material
AssigneeRicoh Company, Ltd.
InventorsTsutomu Matsuda, Masanori Rimoto, Chihiro Hayashi
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Abstract
This invention provides yellow-developing couplers for use in diazo copying materials, which couplers are superior in light fastness and are expressed by the general formula: ##STR1## wherein X and Y represent hydrogen atom, halogen, or alkyl radical or alkoxy radical having 1 to 6 carbon atoms.
Claims5
A diazo copying material comprising a support and a photosensitive layer, said photosensitive layer consisting essentially of a photosensitive diazonium compound and a yellow-developing coupler having the formula:
- ##STR9## wherein X and Y are hydrogen, halogen, alkyl having 1 to 6 carbon atoms or alkoxy having 1 to 6 carbon atoms.
A diazo copying material comprising a support and a photosensitive layer, said photosensitive layer consisting essentially of a photosensitive diazonium compound, a yellow-developing coupler and a blue-developing coupler, said yellow-developing coupler having the formula:
- ##STR10## wherein X and Y are hydrogen, halogen, alkyl having 1 to 6 carbon atoms or alkoxy having 1 to 6 carbon atoms.
Dependencies are inferred from the claim text.