| 摘要 |
A dye donor element has a support carrying a dye layer contg. a triazene dye of formula (I) A = the residue of a diazotisable heteroaromatic amine; R1 and R2 = H, an opt. substd. alkyl, alkenyl, or aryl gp., or aralkyl, or R1+R2 complete an opt.substd. ring system. |
