Mixture of dyes for black laser ablative recording element

Claim 1

A single sheet process of forming a black, dye ablation image having an improved D-min which does not employ a separate receiving element comprising imagewise-heating by means of a laser, a dye-ablative recording element comprising a support having thereon a dye layer comprising image dyes dispersed in a polymeric binder having an infrared-absorbing material associated therewith, said laser exposure taking place through the dye side of said element, and removing the ablated image dye material to obtain said image in said dye-ablative recording element, wherein said dye layer comprises a mixture of at least one cyan, magenta and yellow dye dispersed in a polymeric binder, said cyan dye having the formula: ##STR50## wherein: R 1 and R 2 each independently represents hydrogen; an alkyl group having from 1 to about 6 carbon atoms; a cycloalkyl group having from about 5 to about 7 carbon atoms or an allyl group; or R 1 and R 2 can be joined together to form, along with the nitrogen to which they are attached, a 5- to 7-membered heterocyclic ring; or either or both of R 1 and R 2 can be combined with R 3 to form a 5- to 7-membered heterocyclic ring; each R 3 independently represents hydrogen, alkyl, cycloalkyl or allyl as described above for R 1 and R 2 , alkoxy, aryloxy, halogen, thiocyano, acylamido, ureido, alkylsulfonamido, arylsulfonamido, alkylthio, arylthio or trifluoromethyl; or any two of R 3 may be combined together to form a 5- or 6-membered carbocyclic or heterocyclic ring; or one or two of R 3 may be combined with either or both of R 1 and R 2 to complete a 5 - to 7-membered ring; X represents hydrogen, halogen or may be combined together with Y to represent the atoms necessary to complete a 6-membered aromatic ring; with the proviso that when X is hydrogen, then J represents NHCOR F , where R F represents a perfluorinated alkyl or aryl group; and with the further proviso that when X is halogen, then J represents NHCOR 4 , NHCO 2 R 4 , NHCONHR 4 or NHSO 2 R 4 ; and with the further proviso that when X is combined with Y, then J represents CONHR 4 , SO 2 NHR 4 , CN, SO 2 R 4 or SCN, in which case, however, R 4 cannot be hydrogen; R 4 is the same as R 1 as described above or an aryl group of from about 6 to about 10 carbon atoms; m is an integer of from 0 to 4; and Y is the same as R 1 as described above, an aryl group of from about 6 to about 10 carbon atoms, acylamino or may be combined together with X as described above.