PURPOSE: To enhance tackiness and to improve the accuracy of detection by using an addition product formed by bringing gelatin and N-hydroxyimide ester compd. into reaction as a base material, then by compounding said material with a color forming agent to form a self-adhesive color forming layer.
CONSTITUTION: The addition product obtd. by bringing the gelatin and the compd. expressed by formula I [where A denotes 1W3 kinds of groups selected from an oxyethylene group, oexypropylene group and oxybutyrene group, Z denotes the group selected from formula II, formula III, formula IV, formula V, formula VI, formula VII, formula VIII, and the partial substitution products thereof; (m) denotes 1W300] into reaction is used as the base material. The color forming reagent is compounded with this material to form the self-adhesive color forming layer. The title detecting material is formed of such color forming layer and a sheet-like base. The self-adhesive color forming layer which is thick and has resilience and high tackiness as well as high hydrophilicity is thereby obtd. A gushing water soluble gas or liquid is absorbed and diffused by this layer without suppressing the gushing thereof. The accuracy of the detection is thus improved.
DOI HIROSHI
NAKAJIMA KATSUKAZU
KIMURA TAKESHI
