A process for combining single color feed yarns, either dyed or melt pigmented, without twisting or heat-setting, to form an apparent space-dyed yarn product. The apparatus affords the ability to control ambient conditions while at the same offering enhanced entertainment options. The surface of the substrate is mapped to determine a uniformity of the metallic layer on the surface of the substrate. After a groove is formed such that the insulation layer is removed to expose the inductor pattern, a conductive pattern is conformally formed on the groove and the insulation layer.