Diazotype material containing a 2,5 dialkoxy-4-...

Details Diazotype material containing a 2,5 dialkoxy-4-... Diazotype material containing a 2,5 dialkoxy-4-...

G - Physics

03

C

96/158

G03C 1/52 (2006.01) G03C 1/58 (2006.01)

Patent

CA 1122048

Hoe 77/K 068 (K 2587) DIAZOTYPE MATERIAL Abstract of the Disclosure This invention relates to an improvement in a diazotype ma- terial comprising, in the light-sensitive layer, a diazo component and a coupling component which yields a black dyestuff image, the improvement that the diazo component is a 2,5-dialkoxy-4-morpho- lino-benzene diazonium salt and the coupling component is a com- bination of (a) 6-methoxy-2-hydroxy-3-naphthoic acid-N(.omega.- aminoalkyl)-amide as a blue coupler, (b) a 2-alkyl- or 2-aryl-1,3-dihydroxybenzene or a cyanoacetoamide as a yellow coupler, and (c) at least one compound of the general formula Image X wherein X is zero, =S, =SO, or =SO2, as a reddish-brown coupler, the molar ratio of blue coupler to yellow coupler being in the range of about (0.7 to 0.9) : 1, and the molar ratio of blue coupler to reddish-brown coupler being in the range of about (6 to 12) : 1.

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