PURPOSE: To make the setting of an injecting condition easy by a method wherein a different color paint is preliminarily applied to a surface of a substrate to be processed and an injecting condition is set according to a paint release condition by an injecting processes to define a injecting range of a injecting gun.

CONSTITUTION: To a surface of a substrate 1 to be processed having a recess portion, a paint of which a color is different from a substrate 1 to be processed is painted by a spraying or a brushing method or the like and dried to form a colored coating of a magic ink, copper sulphate, a fluorescent paint or the like. Subsequently, when an injecting test is applied to a substrate to be processed, a paint is released from an area injected by an injecting material and, because a ground color is exposed, the paint released area is distinguished clearly. Moreover, if a test is applied to an indivisual injecting gun 2, an injecting range of one injecting gun is ascertained and an injecting force is determined by the paint release degree.