<p>Raman-active compounds such as polydiacetylenes are provided in the form of particles whose maximum dimension is 40 mu m. They can be formulated into inks, for the purpose of printing on security documents which are thus readily capable of authentication.</p>
申请公布号
WO9111492(A1)
申请公布日期
1991.08.08
申请号
WO1990GB02033
申请日期
1990.12.28
申请人
THE DE LA RUE COMPANY P.L.C.
发明人
BRATCHLEY, ROBIN;NUGENT, NICHOLAS, OLIVER;ELLIS, LINDA, SUSAN