| 摘要 |
PROBLEM TO BE SOLVED: To keep freshness of an ingredient in a wrapped sandwich by a simple method.SOLUTION: The wrapped sandwich is provided by inserting a sandwich including at least fresh vegetables as the ingredient in a bag body which is formed by superposing a pair of plastic film wrapping sheets 1A and 1B and sealing three sides. Strip-like film pieces (5 and 10) interposed between the wrapping sheets and an end surface where the ingredient of the sandwich is exposed are formed of a film containing a predetermined amount of a compound of a typical metallic element belonging to a Ia group or a IIa group in a period 3 or 4 of a periodic table or a compound of a transition metal element in the period 4. The content of the compound is set such that the radiation of a wave motion unique to the element of the compound amplifies the resonance wave motion possessed by the ingredient of the sandwich to be radiated. |
