My “canvas” for the hand felted wall hangings I create is made of the same material I use for creating the design, that is, wool. I make these “canvases” several at a time so that I can work on designs in succession.
To make a ” canvas”, I measure out a certain weight of wool so that I know each canvas will be of uniform density. I use a very precise scale which can handle the needs of weighing wool.
With the measured amount of wool secured, I can then needle felt the wool into the shape and density I need. Not too many artists make their own “canvases,” but for me it’s all part of the creative process.