PURPOSE: To manufacture interior materials for automobiles, etc. in two special short processes which are composed of a base material, a binding layer, a blistering layer, a skin layer and patterns.

CONSTITUTION: In the 1st process are prepared an unblistering layer of thermal plastic synthetic resin on the surface of a base material 1 where a skin layer may or may not be needed. In the 2nd process the base material 1 and unblistering layer are polimerized through a binder layer 2 and at the same time the base meterial is hardened by a high frequency press, an unblistering layer is blistered, a blistered layer 3c is bound with the base material 1 and patterning 7 is conducted. Thus the interior material is manufactured.