HIGH SPEED BINARY BLACK LINE DIAZO PHOTOSENSITIVE PAPER

摘要

PURPOSE:To render the title material similar in sensitivity to that of high speed blue line type, and to develop neutral black both in a high density image area and in a low density area, by combining specified diazo compound, and specified couplers for forming blue, yellow, and brown. CONSTITUTION:A photosensitive layer formed on a paper base contains a diazo compound of formulaIin which R is 1-4C alkyl; R1 and R2 are optionally substituted alkyl, aralkyl, or cycloalkyl, and may form a heterocyclic ring through N; and X is an anion, a blue developing coupler of formulaIIor III in which R3 is H, 1-4C alkyl, or halogen; R4 is H, -(CH2)nOH, or -(CH2)nN(R5)R6; n is 2-4; and R5 and R6 are 1-4C alkyl or may form a heterocyclic ring through N, a yellow developing coupler of formula IV or V, R being methyl or ethyl, and a brown developing coupler of formula VI.