Paired optically variable article with paired optical structures and ink, paint and foil incorporating the same and method

An optically variable article comprising a substrate having a first surface and first and second optical devices at least one of which is optically variable forming a pair carried by the first surface of the substrate in spaced-apart positions without overlap on the first surface of the substrate to permit viewing at the same time by the human eye, said first and second optical devices having the same matching color at one angle of incidence between 0.degree. and 90.degree. for a color match angle and being without color match at all other angles of incidence, said first and second optical devices being opaque.

An optically variable article comprising a substrate having a first surface, a heat fusible toner carried by the first surface of the substrate, and first and second optical devices at least one of which is optically variable, said devices being carried by the heat fusible toner in spaced-apart positions without overlap on the toner and forming a pair that can be viewed at the same time by the human eye, said first and second optical devices having the same matching color at one angle of incidence between 0.degree. and 90.degree. for a color match angle and being without color match at all other angles of incidence.

An optically variable article comprising a substrate having a first surface, first and second optical devices at least one of which is optically variable forming a pair carried by the first surface of the substrate in spaced-apart positions without overlap on the first surface of the substrate to permit viewing at the same time by the human eye, said first and second optical devices having the same matching color at one angle of incidence between 0.degree. and 90.degree. for a color match angle and being without color match at all other angles of incidence, and third and fourth optical devices forming an additional pair carried by the first surface of the substrate in spaced-apart positions without overlap to permit viewing at the same time of the first named pair and the additional pair, said third and fourth optical devices having the same color at the color match angle as the first and second optical devices and having a different color or colors different from said same color at all other angles.

An optically variable article comprising a substrate having a first surface, first and second optical devices at least one of which is optically variable forming a pair carried by the first surface of the substrate in spaced-apart positions without overlap on the first surface of the substrate to permit viewing at the same time by the human eye, said first and second optical devices having the same matching color at one angle of incidence between 0.degree. and 90.degree. for a color match angle and being without color match at all other angles of incidence, and third and fourth optical devices forming an additional pair carried by the first surface of the substrate in spaced-apart positions without overlap to permit viewing at the same time of the first named pair and the additional pair said third and fourth optical devices having a color match at an angle of incidence for an additional color match angle different from the color match angle for the first and second optical devices and being without color match at all other angles other than the additional color match angle.

An optically variable article comprising a substrate having a first surface and first and second opaque optical devices at least one of which is optically variable forming a pair carried by the first surface of the substrate in spaced-apart positions without overlap on the first surface of the substrate to permit viewing at the same time by the human eye, said first and second opaque optical devices having the same matching color at one angle of incidence between 0.degree. and 90.degree. for a color match angle and being without color match at all other angles of incidence, said first and second opaque optical devices having the same matching color with an illuminant at a temperature of 2856.degree. Kelvin.

An optically variable article comprising a substrate having a first surface and first and second opaque optical devices at least one of which is optically variable forming a pair carried by the first surface of the substrate in spaced-apart positions without overlap on the first surface of the substrate to permit viewing at the same time by the human eye, said first and second opaque optical devices having the same matching color at one angle of incidence between 0.degree. and 90.degree. for a color match angle and being without color match at all other angles of incidence, said first and second opaque optical devices having the same matching color with an illuminant at 6770.degree. Kelvin.

An optically variable article comprising a substrate having a first surface and first and second opaque optical devices at least one of which is optically variable forming a pair carried by the first surface of the substrate in spaced-apart positions without overlap on the first surface of the substrate to permit viewing at the same time by the human eye, said first and second opaque optical devices having the same matching color at one angle of incidence between 0.degree. and 90.degree. for a color match angle and being without color match at all other angles of incidence, said first and second opaque optical devices having the same matching color with an illuminant having a temperature of 4200.degree. Kelvin.

An optically variable article comprising a substrate having a first surface, first and second opaque optical devices at least one of which is optically variable forming a pair carried by the first surface of the substrate in spaced-apart positions without overlap on the first surface of the substrate to permit viewing at the same time by the human eye, said first and second opaque optical devices having the same matching color at one angle of incidence between 0.degree. an 90.degree. for a color match angle and being without color match at all other angles of incidence, and a symbol, said symbol being formed by a predetermined arrangement of the first and second opaque optical devices.

An optically variable article adapted to be viewed by the human eye comprising a substrate having a first surface, first and second optically variable devices carried by the first surface of the substrate in spaced-apart positions without overlap on the first surface of the substrate to permit viewing at the same time by the human eye, a first optically variable specular opaque foil disposed in the first optically variable device and a second optically variable specular opaque foil disposed in the second optically variable device, said optically variable specular opaque foils having the same color at one angle of incidence between 0.degree. and 90.degree. for a color match angle and being without color match at all other angles of incidence.

An optically variable article comprising a substrate having a first surface, first and second optical device carried by the first surface of the substrate in spaced-apart positions without overlap on the first surface of the substrate to permit viewing at the same time by the human eye, said first optical device being an optically variable structure and including a first optically variable opaque pigment, said second optical device including a non-shifting pigment, said first and second optical structures having the same color at one angle of incidence between 0.degree. and 90.degree. for a color match angle as the color of the non-shifting pigment and being without color match at all other angles of incidence.

An optically variable structure which is adapted to be used with another optically variable structure as a pair of optically variable structures in spaced-apart positions without overlap on a first surface of a substrate for viewing at the same time by the human eye, wherein said another optically variable structure being formed by a single optically variable opaque multilayer thin film interference stack exhibiting a color at one angle of incidence and different colors at all other angles of incidence, and wherein said optically variable structure comprising a single optically variable opaque multilayer thin film interference stack which is different from the optically variable opaque multilayer thin film interference stack of the another optically variable structure and which exhibits a color which is the same color of the another optically variable structure at the same angle of incidence between 0.degree. and 90.degree. for a color match angle but which is of different colors for all other angles of incidence.

A method for creating a paired colored reflectance for viewing at the same time by a human eye from a substrate having a surface with paired first and second optical structures thereon having colored pigments therein, the first optical structures having an optically variable pigment, forming the optically variable pigment so that it has one color at one angle of incidence that is the same color at the same angle of incidence as the color of the pigment in the second optical structure, illuminating the paired optical structures from a light source so that the paired optical structures reflect the same color at said one angle of incidence between 0.degree. and 90.degree. and reflect at least one different color at all other angles of incidence.