Patent ID: 11945254
Assignee: BASF SE
Field: Other consumer goods (Other fields)
Classification: CPC B  C | IPC B  C

Claim 15:
16. A method of producing the security or decorative element according to claim 1, comprising the steps of
a) providing the substrate having a surface, which surface may contain indicia or other visible features;
b) applying, on top of at least part of the said substrate surface the first layer, comprising transition metal particles having an average diameter of from 5 nm to 500 nm and the binder,
c) applying on at least part of the said first layer the second layer, comprising the organic material and having a refractive index of from 1.2 to 2.3, and a thickness of from 20 to 1000 nm, wherein the transition metal is selected from the group consisting of silver, copper, gold and palladium, wherein the weight ratio of transition metal particles to binder in the first layer is in the range from 20:1 to 1:2 in case the binder is a polymeric binder, or wherein the weight ratio of transition metal particles to binder in the first layer is in the range from 5:1 to 1:15 in case the binder is an UV curable binder.