REEXPRESSION OF TACKINESS

PROBLEM TO BE SOLVED: To express the tackiness of a pressure sensitive adhesive sheet capable of exhibiting original property of the pressure sensitive adhesive sheet, temporally protecting surface of the adhesive and inhibiting a trouble of defective peeling by applying a direct treatment of the surface of the adhesive of the pressure sensitive sheets. SOLUTION: In this method, a non-adhesive film is formed by fixing the non-adhesive material (preferably at least one selected from among polyamine, polyacrylic acid or their modified products) in an interfacial catalytic reaction on the surface of the adhesive of the pressure sensitive adhesive sheets, and in the case of adhering the non-adhesive film is destructed to reexpress the pressure sensitive adhesivity. The prescribed interfacial catalytic reaction is preferably carried out between a compound having a functional group included in the adhesive phase and the non-adhesive material having a functional group reactive to the functional group, and the destruction method of the film is elongation of the pressure sensitive adhesive sheet.