172 the first ridges 170 and the first troughs 172 are alternately formed along the first crimp forming surface 164 of the first die portion 164 that is each first ridge 170 is formed between two first troughs 172 and each first trough 172 is formed between two first ridges 170 the second crimp forming surface 168 comprises a plurality of second ridges only one of which is designated 174 and a plurality of second troughs only one of which is designated 176 the second ridges 174 and the second troughs 176 are alternately formed along the second crimp forming surface 168 of the second die portion 166 that is each second ridge 174 is formed between two second troughs 180 and each second trough 176 is formed between two second ridges 174 the first die portion 162 is selectively moveable between a retracted position fig9 and an extended position fig1 in the retracted position the first die portion 162 is spatially separated from the second die portion 166 in the extended position the first crimp forming surface 164 of the first die portion 162 communicates with the first or the second surface 82 or 84 of the laminated sheet of optical effect material 80 and the second crimp forming surface 168 of the second die portion 166 communicates with the opposite surface 82 or 84 of the laminated sheet of optical effect material 80 the first ridges 170 and the first troughs 172 of the first crimp forming surface 164 of the first die portion 162.