The solidification of pigments intended for use in a paint-by-numbers kit, rendering them unusable, presents a common obstacle for hobbyists. This phenomenon occurs when the volatile components of the paint, typically water or solvents, evaporate, leaving behind a hardened residue. A frequent example is finding small pots of acrylic paint, included within a kit, that have transformed into solid masses, preventing application with a brush.
Addressing this issue is crucial for maintaining the viability of paint-by-numbers as a recreational activity. Prevention through proper storage, such as tightly sealing the paint containers, extends the lifespan of the paints. Understanding the chemical processes involved in paint drying allows for informed decisions regarding appropriate thinning agents and storage methods. The historical popularity of paint-by-numbers underscores the need for solutions to this persistent problem.
