DIFFRACTIVE PIGMENT
    21.
    发明申请

    公开(公告)号:US20220091313A1

    公开(公告)日:2022-03-24

    申请号:US17025824

    申请日:2020-09-18

    Abstract: A diffractive pigment includes diffractive pigment, includes a stack including alternating layers of a high refractive index layer and a low refractive index layer, in which the high refractive index layer is a composition including an organic material and high refractive index inorganic nanoparticles; in which at least one layer of the stack is embossed. A method of making a diffractive pigment is also disclosed.

    Flakes with undulate borders and method of forming thereof

    公开(公告)号:US10308812B2

    公开(公告)日:2019-06-04

    申请号:US15257396

    申请日:2016-09-06

    Abstract: The invention provides a plurality of substantially same planar pigment flakes, each formed of one or more thin film layers. Each flake has a face surface and a flake border delimiting the face surface; the flake border undulates in the plane of the flake. The flakes have a pre-selected shape, may have a symbol or a grating thereon. A method of manufacturing of these flakes including the steps of: (a) providing a substrate having a plurality of one-flake regions and a plurality of depressions or protrusions disposed therebetween and not extending into the one-flake regions, (b) coating the substrate with a releasable coating, and (c) removing the releasable coating and breaking it into the flakes; wherein two adjacent of the one-flake regions are separated by at least three of the depressions or protrusions for facilitating the breaking of the releasable coating into the flakes.

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