I am working on a product: coloring book where pages "paint" themselves. What I mean by this is when you paint a part of the picture, lets say character's ears, the color of eyes, faces, hair appears by itself. This may be triggered by a special paint that is pre-applied on the "self-painting" parts and is activated/becomes visible when a user colors adjacent part/s with a marker.
Previous experience with color-changing materials is desired.
Access to the lab is desired for this project.
Contact me for more details.