| 摘要 |
PROBLEM TO BE SOLVED: To provide a double container capable of housing the contents includ ing an ingredient generating a decomposed gas while removing the decomposed gas without breakage of the container. SOLUTION: In the double container constituted of a flexible outer container 13 communicating with the outside air and an inner container 14 housing the contents and having a space 20 between the outer container 13 and the inner bag 14, the contents include a decomposable ingredient generating a gas and a volatile ingredient, and the inner bag 14 is permeable to the decomposed gas 5 generated out of the decomposable ingredient of the contents. The decomposed gas can reasonably permeate the inner bag 14 and can be discharged to the outside. The volatile gas generated from the volatile ingredient stagnates in the space 20 at the outside of the inner bag 14 and makes it hard for newly generated volatile gas to pass through the inner bag 14 and restricts dispersion of the volatile gas and effectively suppresses deterioration of a hair dye.
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