Disclosed herein is a resin substrate, including: an insulating material; and a resin layer formed on the insulating material and having surface roughness. Next, the capacitor element is immersed in a solution of less than 10 wt %, preferably between 2. The device comprises a reference electrode and a second electrode coupled to an insulating body. At least one API includes multiple, alternative values in its first ToS field. The inventive film provides a method to vary the color or colors of the outer surfaces of the film which is advantageous in the variety of obtainable colors and also in cost when less expensive pigments are used in the opaque core which allows using less of expensive pigments in the pigmented color layers.