| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a packaging bag for retort by which whether a retort process has surely been performed or not can easily visually be checked when the packaging bag is used for the sterilization by treating with steam or hot water of a high temperature such as a retort sterilization while housing a content such as a curry. <P>SOLUTION: This packaging bag for retort comprises a laminated body having a base material layer and a heat-bondable resin layer. The packaging bag for retort is constituted by forming an indicator ink layer composed of an ink containing an aluminum powder pigment which is de-colored by the retort process on the external surface of the base material layer. Alternatively, the packaging bag for retort is constituted by forming the indicator ink layer comprising the ink containing the aluminum powder pigment which is de-colored by the retort process on the external surface of the base material layer, and at the same time, forming a display section on the internal surface of the base material layer at the region where the indicator ink layer is formed. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
