If the plastic is to be printed, an additional step is done during the extrusion process. The plastic film is electrostatically treated. This places little dents in the plastic’s surface allowing ink to stick to the plastic. During the printing process, the equipment determines how many colors it is capable of printing. The colors are applied one at a time beginning with the lightest color. The inks are capable of drying very fast. However, some heat is applied to speed up the drying process.