| abstract |
PROBLEM TO BE SOLVED: To ensure visibility of presence / absence of boil sterilization and retort sterilization, heat resistance, solvent resistance and water resistance, and to change the display after printing by rubbing the outer surface, etc. Reduces economic loss such as disposal, is superior in cost and environment, shortens switching work time, reduces work load, and has a laminate with a heat treatment indicator that can be used for multi-product, small-lot production, and The package used is provided. A substrate film layer and a heat seal layer are sequentially laminated via an adhesive layer, and the laminate surface side of the substrate film layer contains a pigment and a binder made of a synthetic resin. The heat treatment indicator ink composition is irreversibly changed in color by heating, and is formed by a print head of an injection printer. [Selection] Figure 1 |