Daler Rowney Staywet Refill Large

For acrylic painting - will keep acrylic paints moist and workable for weeks. Clear lidded plastic tray contains three sheets of "reservoir" paper and 12 sheets of "membrane paper". Stay-Wet works by osmosis moisture evaporating from the surface is replaced by water from the dampened reservoir paper beneath the semi-permeable membrane which forms the working surface of the palette.