The invention relates to improvements in substrates and in particular to new substrates having magnetic and visual security features, which provide security against imitation. A security substrate comprising a transparent polymer carrier layer bearing indicia formed from a plurality of opaque and non-opaque regions and a clear and transparent magnetic layer supported by the carrier layer containing a distribution of particles of a soft magnetic material of a size and distributed in a concentration at which the magnetic layer remains clear and transparent.
申请公布号
WO03091952(A2)
申请公布日期
2003.11.06
申请号
WO2003GB01678
申请日期
2003.04.24
申请人
DE LA RUE INTERNATIONAL LIMITED;SNELLING, JAMES, PETER;ISHERWOOD, ROLAND;BROWN, ALAN
发明人
SNELLING, JAMES, PETER;ISHERWOOD, ROLAND;BROWN, ALAN