Viva Make :- RUBBER SHEET EMBOSSING MACHINE R2R hot embossing process for micro-pyramid arrays to understand the effect of shape preserving mechanism As a result, the process window was extended by the shape preserving mechanism. More importantly, the feeding speed was improved from 0.5 m min-1 to 2.5 m min-1 for the large-area fabrication of micro-pyramid arrays, which is very attractive to the industrialization of this technology.