An article including a reflector having a first surface and a second surface opposite the first surface; a first selective light modulator layer external to the first surface of the reflector; a second selective light modulator layer external to the second surface of the reflector; a first absorber layer external to the first selective light modulator layer; and a second absorber layer external to the second selective light modulator layer; wherein each of the first and second selective light modulator layers include a host material is disclosed herein. Methods of making the article are also disclosed.

An article including a reflector having a first surface and a second surface opposite the first surface; a first selective light modulator layer external to the first surface of the reflector; a second selective light modulator layer external to the second surface of the reflector; a first absorber layer external to the first selective light modulator layer; and a second absorber layer external to the second selective light modulator layer; wherein each of the first and second selective light modulator layers include a host material is disclosed herein. Methods of making the article are also disclosed.

A pearlescent pigment for security purposes according to an embodiment of the present invention includes a single or a plurality of coating layers containing a metal oxide and an organic or inorganic fluorescent material. Since the pearlescent pigment for security purposes according to the present disclosure includes a fluorescent layer containing the organic or inorganic fluorescent material, it can be used as a pigment for security purposes due to its optical characteristics and can also provide effects such as magnetism, high color intensity, multiple colors, etc. Also, since the pearlescent pigment for security purposes has aesthetic benefit and security characteristic at the same time, it is economical, easy to use and applicable in various industries.

An article including a reflector having a first surface and a second surface opposite the first surface; a first selective light modulator layer external to the first surface of the reflector; a second selective light modulator layer external to the second surface of the reflector; a first absorber layer external to the first selective light modulator layer; and a second absorber layer external to the second selective light modulator layer; wherein each of the first and second selective light modulator layers include a host material is disclosed herein. Methods of making the article are also disclosed.

A composition including a first color shifting pigment flake population having a first D50 particle size; and a second color shifting pigment flake population having a second D50 particle size that is different from the first D50 particle size, wherein the first color shifting pigment flake population and the second color shifting pigment flake population have a similar face color and color shift is disclosed. An article including the composition is included. A method of making the composition and a method of making the article are also disclosed.

A pearlescent pigment for security purposes according to an embodiment of the present invention includes a single or a plurality of coating layers containing a metal oxide and an organic or inorganic fluorescent material. Since the pearlescent pigment for security purposes according to the present disclosure includes a fluorescent layer containing the organic or inorganic fluorescent material, it can be used as a pigment for security purposes due to its optical characteristics and can also provide effects such as magnetism, high color intensity, multiple colors, etc. Also, since the pearlescent pigment for security purposes has aesthetic benefit and security characteristic at the same time, it is economical, easy to use and applicable in various industries.

An optical device includes a colored reflector layer having a first surface, a second surface opposite the first surface, and a third surface; and a selective light modulator layer external to the first surface of the colored reflector layer. A method of making an optical device is also disclosed.

An optical device includes a colored reflector layer having a first surface, a second surface opposite the first surface, and a third surface; and a selective light modulator layer external to the first surface of the colored reflector layer. A method of making an optical device is also disclosed.

An optical device includes a colored reflector layer having a first surface, a second surface opposite the first surface, and a third surface; and a selective light modulator layer external to the first surface of the colored reflector layer. A method of making an optical device is also disclosed.

The present invention is related to brilliant black pigments comprising a flaky aluminum oxide substrate having a coating comprising a layered structure composed of a hematite and a magnetite layer, to a process for the production of said pigments, as well as to their use.