NOVELTY - A composition comprises 50-100 %mass block isocyanate (A) with respect to solid content of composition.    USE - Composition is used for forming receiving layer on acceptance base material for printed material for electroconductive pattern for electronic circuits (all claimed), recording medium for manufacture of advertisement installed indoor and outdoor e.g. signboards, labels, and silver-halide photography, organic solar cells, electronic book terminals, organic electroluminescent display devices, organic transistors, flexible printed circuit boards, plasma displays, integrated circuits, and printed electronics.    ADVANTAGE - The composition provides recording medium with excellent adhesiveness with respect to support components, receiving layer with excellent durability, and electroconductive patterns having favorable electroconductivity without causing disconnection for long period of time.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) acceptance base material, which consists of receiving layer formed on a portion or whole support surface using composition;    (2) printed material, to which printing is performed with fluid containing electroconductive substance or pigment on the receiving layer of the acceptance base material;    (3) electroconductive pattern, in which printing is performed on the receiving layer of the acceptance base material using the electroconductive ink containing electroconductive substance, or the fluid containing metal-plated nucleating agent containing electroconductive substance;    (4) electric circuit, which has electroconductive pattern;    (5) manufacture of printed material, which involves coating composition on a portion or whole surface of the support component, drying without dissociating the block isocyanate (A) comprised in blocking agent, forming the receiving layer for accepting the fluid containing electroconductive substance or pigment, printing the fluid on the surface of the receiving layer, heating and carrying out self-crosslinking reaction of the isocyanate group which is generated by dissociating blocking agent; and    (6) manufacture of electroconductive pattern, which involves forming printed material, and carrying out metal-plating process of printed portion formed on receiving layer surface.