Of course the concept necessitates that the size and format of each remain constant for ease of replacement, so I've limited myself to 8" x 10" (inches!... how backward am I?).
I have done many layers of paint on acid free cartridge paper that was first gessoed several times on each side. These pieces are then glued to the wide edge canvas (also gessoed several times) then varnished a few times to ensure that they are well sealed. These will not be framed although the purchaser (if there is one....or two...hopefully) is then free to frame...or not.
The first of this series.....