WET HEAT DISCOLORING INK COMPOSITION FOR INK JET PRINTER

摘要

PURPOSE:To provide the title composition showing wet heat discoloration, discoloring under variable conditions and giving clear printing to sterilized matter, which can be used for the confirmation of sterilization in the process control of a steam sterilization treatment, by incorporating specific dye, organic acid (metal salt) and conductivity imparting material into ink. CONSTITUTION:The title composition contains a dye of at least Methyl Yellow, an organic acid (metal salt) (e.g. salicylic acid) and a conductivity imparting material (e.g. ammonium thiocyanate).