Activa has sold art and craft supplies since 1959. Frank Strauss purchased Activa in 1970, and it's a privately held company today. One of the largest producers of instant paper mache, plaster cloth, and colored sand in the United States, Activa offers a wide range of supplies fo ... Read More r artists and craftspeople of all levels. The Activa Rigid Wrap Plaster Cloth is high-quality plaster gauze that's designed for making sculptures, masks, jewelry, and props and scenery. The easy-to-use cloth dries quickly, with an even texture. You simply cut it to the desired length, dip it in warm water, shape it, let it dry, and then paint it. It takes any shape and covers any form to create amazing shapes in less than 30 minutes.