what is the life span of poster paint?

The lifespan of poster paint can vary based on storage conditions and the materials used. Generally, unopened poster paint can last for several years, while opened paint may last from a few months to a couple of years if stored properly in a cool, dry place and sealed tightly. However, once it starts to dry out or shows signs of separation or mold, it's best to discard it. Always check the manufacturer's recommendations for specific guidance on shelf life.