Ceramic palettes are suitable for watercolour, gouache and especially acrylic paints. Because of the impervious nature of glazed porcelain waterbased fluids, even determined ones like acrylics, can not adhere to the surface of these dishes like they do to most plastic ones. Once paint is dry, simply submerse in hot water and acrylic paint will easily lift off. No more scratched palettes that won't clean. All are made of glazed porcelain.