| http://www.w3.org/ns/prov#value | - Accordingly, the layer structure as shown in FIG. 6 is particularly advantageous in the case where a layer containing the TA substrate composition, the POP composition or the color indicator for detecting hydrogen peroxide is desired to be provided as a lower layer so as not to contact with air, for the reason that the color indicator for detecting hydrogen peroxide contains a component(s) which m
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