LINERLESS LABELS

摘要

A linerless label system comprising pressure adhesive coating, release coating and thermal imaging coating is described. The thermal imaging coating contains as one of its components the compounds of the formula (I) wherein R₁ and R₂ are selected from methyl, ethyl, aryl, aryl substituted with methyl, ethyl, methoxy, ethoxy or halogen, benzyl or benzyl with phenyl substituted with methyl, ethyl, methoxy, ethoxy or halogen, R₃,R₄,R₅ and R₆ are selected from hydrogen, halogen, methyl, ethyl, methoxy, ethoxy, phenyl, R₇ and R₈ are each independently selected from methyl or ethyl, R₉ is selected from hydrogen, methoxy or ethoxy, R₁₀ is selected from hydrogen, dimethylamino or diethylamino, R₁₁ is methyl. The imaged linerless label according to the invention has been a bar reflectance of less than 20 at 670 nanometers, a print control contrast signal of at least 80 and a BNL background of at least 75%.