Fig. 2
A The large cotton duck canvas was soiled with three ink levels; rectangular specimens were cut parallel to the two perpendicular fiber orientations. B This plain weave canvas has two adjacent (vertical) warp yarns perpendicular to a single thicker (horizontal) weft yarn in this enlarged (microscope) image. C Images of two representative canvas specimens, soiled with either light or heavy ink levels, approaching their tensile break strains (90° orientation). D Enlarged (microscope) image of the end of a sharply cut weft yarn (0.393-mm diameter) taken from the heavy-ink canvas