A composition including a first color shifting pigment having a first color shift that extends from a starting color at normal through a plurality of colors as a viewing angle is increased to a final color, wherein the first color shift rotates counterclockwise relative to, and about, an origin of the L*a*b* color space; and a color filter that transmits a portion of the first color shift of the first color shifting pigment and absorbs a remainder of the first color shift of the first color shifting pigment; wherein the composition has a second color shift different from the first color shift; and wherein the second color shift has a first portion that rotates counterclockwise relative to the origin and a second portion that rotates clockwise relative to the origin is disclosed. A security device including the composition is included. A method of making the composition and a method of authenticating the security device are also disclosed.

A composition including a first color shifting pigment having a first color shift that extends from a starting color at normal through a plurality of colors as a viewing angle is increased to a final color, wherein the first color shift rotates counterclockwise relative to, and about, an origin of the L*a*b* color space; and a color filter that transmits a portion of the first color shift of the first color shifting pigment and absorbs a remainder of the first color shift of the first color shifting pigment; wherein the composition has a second color shift different from the first color shift; and wherein the second color shift has a first portion that rotates counterclockwise relative to the origin and a second portion that rotates clockwise relative to the origin is disclosed. A security device including the composition is included. A method of making the composition and a method of authenticating the security device are also disclosed.

A workpiece composed of acrylic material can be modified to produce a highly visual and aesthetic prismatic effect in which white light entering the workpiece can exit the workpiece in separate colors and sets. By applying dichroic paint and primer to precision cuts made into one of the planar surfaces of the workpiece, preferably filling in the spaces with a resin epoxy and then preferably sanding the surface, many more colors can be generated by the white light exiting the workpiece.

A workpiece composed of acrylic material can be modified to produce a highly visual and aesthetic prismatic effect in which white light entering the workpiece can exit the workpiece in separate colors and sets. By applying dichroic paint and primer to precision cuts made into one of the planar surfaces of the workpiece, preferably filling in the spaces with a resin epoxy and then preferably sanding the surface, many more colors can be generated by the white light exiting the workpiece.

Disclosed in certain embodiments is a coating composition comprising (i) a solvent, (ii) a resinous binder and (iii) a structural colorant comprising spherical photonic structures and corresponding coatings, coated automotive parts and methods thereof.

The present invention provides an interference pigment that develops interference colors even on light-colored bases. An interference pigment 1 of the present invention includes: a flaky inorganic substrate 10; a transparent metal layer 20 that coats the inorganic substrate 10; and a metal oxide layer 30 that coats the metal layer 20.

The present invention provides an interference pigment that develops interference colors even on light-colored bases. An interference pigment 1 of the present invention includes: a flaky inorganic substrate 10; a transparent metal layer 20 that coats the inorganic substrate 10; and a metal oxide layer 30 that coats the metal layer 20.

To provide a coating film having higher luminance. A coating composition including a coating-film-forming resin and a pigment, wherein: the pigment includes a scaly vapor-deposited metal pigment; and a cured coating film of the coating composition has a sparkle intensity (Si) at an angle of incidence of 45° of 20 or higher, a sparkle area (Sa value) of 10 or higher, and a granularity value (G value) that exceeds 10.

Disclosed in certain embodiments is a liquid coating composition comprising a liquid medium and a structural colorant comprising photonic particles comprising a metal oxide, the photonic particles having silane functional groups on at least a portion of the external surface of the photonic particles.

The present invention relates to compositions, comprising platelet-shaped transition metal particles, wherein the number mean diameter of the platelet-shaped transition metal particles, present in the composition, is in the range of 15 nm to 1000 nm and the number mean thickness of the platelet-shaped transition metal particles, present in the composition, is in the range of 2 to 40 nm, the transition metal is selected from silver, copper, gold and palladium and the platelet-shaped transition metal particles bear a surface modifying agent of formula A-(CHR.sup.9).sub.r—R.sup.10 (V), wherein if r is 1, A is a C.sub.1-C.sub.25alkyl group substituted with one, or more fluorine atoms; a C.sub.2-C.sub.25alkenyl substituted with one, or more fluorine atoms; a C.sub.2-C.sub.25alkynyl group substituted with one, or more fluorine atoms; a C.sub.3-C.sub.20cycloalkyl group substituted with one, or more fluorine atoms; or a C.sub.6-C.sub.24aryl group substituted with one, or more fluorine atoms, CF.sub.3 or —O—CF.sub.3 groups; if r is 0, A is a C.sub.6-C.sub.24aryl group substituted with one, or more fluorine atoms, CF.sub.3 or —O—CF.sub.3 groups; or a C.sub.7-C.sub.24aralkyl group substituted with one, or more fluorine atoms, CF.sub.3 or —O—CF.sub.3 groups;

R.sup.9 is H, or a C.sub.1-C.sub.4alkyl group; and R.sup.10 is a thiol group, or an amino group.

Surface modification with fluorinated thiols/amines allows to tune the surface properties of silver nanoplatelets in such a way, as to, on the one hand, make them dispersible and colloidally stable in the finished printing ink system, and on the other hand, allow them to migrate to the substrate and print surfaces upon drying of the solvent in the printed layer.