in a method for injection molding molten materials , especially plastic , in a mold that has a mold surface which comes into contact with the material , at least one coating on the mold surface and a temperature - control means for the mold surface , the mold surface is cooled by the temperature - control means so that the molten material solidifies at the interface with the coating and an injection - molded part can be removed from the form . during this process the molten material is brought into contact with the coating on the mold surface , the thickness of said coating being selected in coordination with the heat penetration coefficient of the coating material such that a specified 60 ° gloss level and / or color value l is obtained for the injection - molded part .