caa a22 4500 463224833 CHVBK 20180405153223.0 cr unu---uuuuu 170326e20070601xx s 000 0 eng 10.1007/s10853-006-0651-1 doi (NATIONALLICENCE)springer-10.1007/s10853-006-0651-1 Hot embossing of grating-based optically variable images in thermoplastic acrylic lacquer [Elektronische Daten] [P. Leech, R. Lee] We report the novel use of thermoplastic acrylic lacquer (automotive paint) in the hot embossing of nanoscale structures. Replicas of grating arrays have been produced in coatings of acrylic lacquer using a standard embossing process. The master dies for the experiments comprised grating arrays fabricated by electron beam lithography. Grating patterns with a pitch of 0.7-1.3μm were configured to produce diffractive images over an area of ∼25×25mm. The embossing experiments used a replicated Ni shim as a die and were performed at 100-150°C and 80kN force. A temperature above the glass transition temperature for the lacquer, T=120-150°C, was required in order to achieve a uniform impression across the embossed area of ∼80×80mm. The diffractive grating patterns which were embossed into acrylic lacquer have shown optical effects suitable as a security feature including image switching and color movement. Springer Science+Business Media, LLC, 2007 Leech P. CSIRO Manufacturing and Materials Technology, 3169, Clayton, VIC, Australia aut Lee R. CSIRO Manufacturing and Materials Technology, 3169, Clayton, VIC, Australia aut Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/12(2007-06-01), 4428-4434 0022-2461 42:12<4428 2007 42 10853 https://doi.org/10.1007/s10853-006-0651-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-006-0651-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Leech P. CSIRO Manufacturing and Materials Technology, 3169, Clayton, VIC, Australia aut NATIONALLICENCE 700 1- Lee R. CSIRO Manufacturing and Materials Technology, 3169, Clayton, VIC, Australia aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/12(2007-06-01), 4428-4434 0022-2461 42:12<4428 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer