Art Essentials Caravaggio Series 504 Primed Artists’ Canvas is an artist quality 100% polyester canvas, with a fine grain and is 200 GSM / 7 Oz thick. The polyester fabric is double primed with a universal primer, making it ideal for oil, acrylic, tempera & mixed media painting. This canvas has a fine texture & extreme strength. It has been specially developed to obtain smooth surfaces and is ideal for portrait paintings.