| abstract |
PROBLEM TO BE SOLVED: To provide a laminated retort material for packaging, a packaging retort body, and a packaging retort printing body comprising the same, by forming a printing line that is thick and easy to read by irradiating a low-power laser that does not damage the film. For the purpose. A laminated retort material for packaging consisting of at least a substrate, a pattern printing layer, a printing underlayer and a sealant layer, wherein the region of only the printing underlayer directly in contact with the substrate is a laser printing region. The printing underlayer is a layer formed of an ink composition containing a bismuth compound and other inorganic compounds, and is a laser coloring ink that can be colored and printed by laser light. It is a laminated retort material for packaging that can be printed with a YAG or YVO4 laser, a packaging retort body, and a laminated retort laser printed body for packaging that is colored and printed on the retort material or retort body with a laser. [Selection] Figure 1 |