Use of mixture of dyes for black laser ablative recording element

• Main Authors: KASZCZUK, LINDA, TOPEL, RICHARD W., JR, EVANS, STEVEN
• Format: Patent
• Language: English; French; German
• Published: 01.02.1995
• Edition: 6
• Subjects: COLOUR PRINTING; LINING MACHINES; PERFORMING OPERATIONS; PRINTING; PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; STAMPS; TRANSPORTING; TYPEWRITERS

A process of forming a black, dye ablation image having an improved D-min 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, the laser exposure taking place through the dye side of the element, and removing the ablated image dye material to obtain the image in the dye-ablative recording element, wherein the dye layer comprises a mixture of at least one cyan, magenta and yellow dye dispersed in a polymeric binder, the cyan dye having the formula: wherein: R and R each independently represents hydrogen; a substituted or unsubstituted alkyl group having from 1 to about 6 carbon atoms; a substituted or unsubstituted cycloalkyl group having from about 5 to about 7 carbon atoms or a substituted or unsubstituted allyl group; or R and R 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 and R can be combined with R to form a 5- to 7-membered heterocyclic ring; each R independently represents substituted or unsubstituted alkyl, cycloalkyl or allyl as described above for R and R , alkoxy, aryloxy, halogen, thiocyano, acylamido, ureido, alkylsulfonamido, arylsulfonamido, alkylthio, arylthio or trifluoromethyl; or any two of R may be combined together to form a 5- or 6-membered carbocyclic or heterocyclic ring; or one or two of R may be combined with either or both of R and R 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 NHCORF, where RF represents a perfluorinated alkyl or aryl group; and with the further proviso that when X is halogen, then J represents NHCOR , NHCO2R , NHCONHR or NHSO2R ; and with the further proviso that when X is combined with Y, then J represents CONHR , SO2NHR , CN, SO2R or SCN, in which case, however, R cannot be hydrogen; R is the same as R as described above or a substituted or unsubstituted aryl group of from about 6 to about l0 carbon atoms; m is an integer of from 0 to 4; and Y is the same as R as described above, a substituted or unsubstituted aryl group of from about 6 to about l0 carbon atoms, acylamino or may be combined together with X as described above.