| 摘要 |
PURPOSE:To enjoy a beautiful change in colors while visually confirming a heated temperature of food and soup put in a package at the time of heating by putting a metallic foil lid with thermal transition ink applied on a surface over the package. CONSTITUTION:A package with lid 7 with food cooked in a kitchen in advance and liquid such as soup, 'crab pot dish' for example put into a container 5, a lid 1 is put over, and a stage 6 of the package with lid 7 is put on a support 8' of a portable stove 8. By making a fire on portable fuel 9 put in the stove 8 for heating, the 'crab pot dish' put in the container 5 is heated, and when the lid 1 reaches a predetermined temperature, approximately 90 deg. for example, thermaly discoloring ink applied to the entire lid 1 changes its color so that the lid 1 changes in color from green to blue. This change in color allows a user to know that the 'crab pot dish' has been heated to approximateiy 90 deg. or higher and also to eat the 'crab pot dish' while visually enjoying the transition in color. |
