Binney & Smith Inc.

Crayola Llc.

Arthur N Urbanski

Craig Skinner

Richard J Kaiser

Cheryl D Krieger

Jie Li

Stephen D Glasscock

Karl Guyler

The present invention is a system for hiding and later revealing a hidden layer. The system includes a substrate and applicator. As the user moves the applicator around the substrate, a coating is rendered transparent to reveal a hidden layer under the pattern of the user's movement of the applicator. The system comprises a substrate at least partially coated with a generally opaque coating that reacts with an eradicator fluid. A preferred coating as applied to the substrate comprises 20-80 wt % water, 0-3 wt % defoamer, 0-3 wt % surfactant, 0-5 wt % wetting agent, 1-25 wt % colorant, 1-60 wt % resin, and 0-4 wt % preservatives. A preferred reducing fluid in such case comprises 30-95 wt % water, 1-5 wt % pH adjuster, 5-15 wt % reducing agent, 0-5 wt % surfactant, and 2-10 wt % buffer.

Coated art material system

A marking system that advantageously minimizes messiness during use is disclosed. The marking system comprises a marking composition comprising at least one color precursor in the form of a leuco dye. A marking instrument can be utilized to store the marking composition and/or apply the marking composition to a desired substrate. The substrate is provided with a coating comprising at least one color-triggering developer. Upon application of the leuco dye to the substrate, a chromophore, and hence, color, is formed. If, however, color is inadvertently triggered on an unintended surface, thereby resulting in an unwanted stain, the stain can be readily removed.

Marking system

Growing community of inventors

Bangor, PA, United States of America

Arthur N Urbanski