Abstract:
A refrigerant pack is provided with a refrigerant substance containing water, a precipitating component, a non-precipitating component, and a pH indicator, and is configured such that the precipitating component precipitates when the refrigerant substance freezes and is a component not corresponding to the pH indicator, the non-precipitating component does not precipitate when the refrigerant substance freezes and is a component not corresponding to the pH indicator, a change or the presence/absence of coloring in the pH indicator is reflected before and after freezing, and the refrigerant substance changes in color.
Abstract:
An implement for storage at a constant temperature has two housings (21 and 22) that accommodate heat storage agents. One heat storage agent (41) is irremovably accommodated in one housing (21), and a hook-and-loop fastener (30) for installation in a storage container is provided on the outer surface of the other housing (22).
Abstract:
An implement for storage at a constant temperature has two housings (21 and 22) that accommodate heat storage agents. One heat storage agent (41) is irremovably accommodated in one housing (21), and a hook-and-loop fastener (30) for installation in a storage container is provided on the outer surface of the other housing (22).