COLOR DEVELOPMENT WRITING COMPOSITIONS AND WRITING INSTRUMENTS

摘要

Writing compositions capable of undergoing a color development whenbrought into contact with a specific substrate including a color change-inducingcompound are provided. Application of the writing compositions to surfacesother thanthe intended substrate will avoid color development and prevent staining oftheunintended surfaces. The writing compositions include at least one particulatefillerincluding a clay, at least one leuco dye, one or more waxes chosen from agroupconsisting of polyethylene wax, soy wax, paraffin wax, and beeswax, at leastonethermoplastic binder material including a polyethylene, titanium dioxide, andoptionally at least one additive.