The condition of pigments in paint-by-number kits that have solidified and become unusable presents a common obstacle for enthusiasts. This typically occurs due to evaporation of the vehicle, the liquid component that carries the pigment, leading to a hardened, often cracked, consistency. A frequently encountered example is opening a new or stored paint-by-number set only to discover that several or all of the individual color pots are no longer in a liquid state.
The usability of these kits is significantly impacted by this phenomenon. Restoring the paint’s original consistency allows users to fully engage with the creative process and achieve the intended artistic outcome. Understanding the causes and available restoration techniques can prevent discarding potentially salvageable materials, thereby reducing waste and maintaining the accessibility of the hobby. Historically, the longevity of these kits has been a concern, necessitating solutions to address the inherent vulnerability of acrylic paints to drying out.