<p>The present invention provides a method of authenticating the provenance of an article marked with a transparent polymer film comprising measuring the thickness of the film or of a layer within in the film by white light interferometry and/or by birefringence.</p>
申请公布号
WO2012032361(A1)
申请公布日期
2012.03.15
申请号
WO2011GB51696
申请日期
2011.09.09
申请人
INNOVIA FILMS SARL;LANGSTAFF, STEPHEN;STEWART, ROBERT
