Color development writing compositions and writing instruments

Abstract

Writing compositions capable of undergoing a color development when brought into contact with a specific substrate including a color change-inducing compound are provided. Writing instruments comprising such writing compositions are also provided. Application of the writing compositions to surfaces other than the intended substrate will avoid color development and prevent staining of the unintended surfaces. The writing compositions include at least one filler; at least one leuco dye; at least one lipid including at least one wax, at least one fatty acid, at least one fatty acid ester; an antioxidant; and optionally at least one additive.

Dependencies are inferred from the claim text.