Abstract: An optical article comprising a primary mark disposed on the optical article and a secondary mark disposed on the optical article in close proximity to the primary mark. The primary mark comprises a first optical-state change material and the secondary mark comprises a second optical-state change material. The optical article is transformed from a pre-activated state to an activated state when a localized authorized activation method is used that selectively activates the primary mark. The optical article is transformed from a pre-activated state to an deactivated state when a non-localized unauthorized activation method is used that activates the secondary mark along with the primary mark resulting in the second optical-state change material undergoing a reverse color change when compared to the first optical-state change material. An optical article with a single mark including multiple color change optical-state change material is also disclosed.

Abstract: A thermally responsive ink composition consisting of at least one halochromic optical-state change material, at least one base, at least one solvent, and at least one binder material. The pH of the ink composition is such that the halochromic optical-state change material remains in its basic state until it is acted upon by a thermal stimulus. The ink composition is capable of transforming from a first optical state to a second optical state upon a change in pH caused by exposure to a thermal stimulus. A thermally responsive ink composition consisting of at least one quaternary onium salt of an halochromic optical-state change material, at least one solvent, and at least one binder material is also disclosed. Coating compositions prepared using these ink compositions and optical articles comprising these coating compositions are also disclosed.

Abstract: A thermally responsive ink composition consisting of at least one halochromic optical-state change material, at least one base, at least one solvent, and at least one binder material. The pH of the ink composition is such that the halochromic optical-state change material remains in its basic state until it is acted upon by a thermal stimulus. The ink composition is capable of transforming from a first optical state to a second optical state upon a change in pH caused by exposure to a thermal stimulus. A thermally responsive ink composition consisting of at least one quaternary onium salt of an halochromic optical-state change material, at least one solvent, and at least one binder material is also disclosed. Coating compositions prepared using these ink compositions and optical articles comprising these coating compositions are also disclosed.

Abstract: An optical article comprising a primary mark disposed on the optical article and a secondary mark disposed on the optical article in close proximity to the primary mark. The primary mark comprises a first optical-state change material and the secondary mark comprises a second optical-state change material. The optical article is transformed from a pre-activated state to an activated state when a localized authorized activation method is used that selectively activates the primary mark. The optical article is transformed from a pre-activated state to an deactivated state when a non-localized unauthorized activation method is used that activates the secondary mark along with the primary mark resulting in the second optical-state change material undergoing a reverse color change when compared to the first optical-state change material. An optical article with a single mark including multiple color change optical-state change material is also disclosed.