The load-strain curves under uniaxial tension, were obtained for the weft and warp directions, and for the direction at an angle of 45° to the warp, of 5 types of canvas. These tests were performed with the canvas samples un-impregnated and with them impregnated with a beeswax/resin adhesive mixture. It was found that the effect of the impregnation was to introduce a new initial zone of high modulus into the load-strain curve. In addition when impregnated, the anisotropy of the canvas was greatly reduced at low strains and the samples exhibited an increased tendency to failure. Author's address: Technology Department, Courtauld Institute of Art, University of London, 20 Portman Sq., London W1H OBE, Great Britain.