The longevity of art supplies depends on a few factors, including the type of material and how it is stored. Generally speaking, paint, brushes, canvas, and other materials should last for years when properly cared for.
Watercolor paints may dry out after about two years if not stored in a cool, dark place with minimal exposure to air and light.
Acrylics, on the other hand, may last indefinitely if stored properly. Brushes should be cleaned regularly and stored in a dry place with the bristles pointed up.
Canvases can last for decades if sealed correctly before use.
Paper products such as sketchbooks can last for years if kept in an acid-free environment away from direct sunlight. With proper care and storage, art supplies can last for a long time.
In general, when it comes to storing and using art materials properly, the key is to keep them in an environment that is dark, cool, dry, and away from direct sunlight or moisture.
Additionally, most materials should be sealed with a protective coating before use to ensure their longevity. Following this advice should help keep art supplies in good condition for many years to come.