Transparent Gesso has been specifically formulated to be mixed with the Matisse Background Colours to give a colored primer with extra “tooth” for painting and especially as a pastel primer. Mix 1 part MM26 Transparent Gesso with 2 parts Matisse Background Colour (up to equal parts), stir well; the resultant mixture will give a brilliant surface on paper, board or canvas with which to accept and hold pastels including oil pastels.