Inlay for a value and / or security document and method of producing the

The invention relates to a semi-finished product and a method for fabricating a preform, comprising an inlay (10) for a security document or. The method comprises the steps of: providing at least one first plastic material (15) and providing at least one of the first plastic material (15) different second plastic material (20), performing an injection compression molding method using the first and the second plastic material (15, 20) for forming of the inlay (10), wherein the inlay (10) perpendicular to its planar extension a uniform thickness.