Provided is a method for manufacturing a translucent rigid substrate laminate which can improve a thickness precision while decreasing the risk of fractures. The integral slide and guard is formed as a single unit, thus alleviating previous problems of attachment of zipper guards to zipper slides. In certain example embodiments, the coating or layer system has good corrosion resistance, good mechanical performance such as scratch resistance, andor good color stability upon heat treatment. The tightening mechanism allows incremental adjustment of the tension of the lace. The sum of the drain current ID1 of the MOS transistor M1 and the output current ISQ2 of the current mirror circuit 2 determine the differential output current I. Additional possible system and process components may determine an authenticity status of the data indicia, and provide an output result.