Explanatory notes
… These are generally plain weave woven fabrics, usually of cotton, linen or man‑made fibres, heavily coated with gum or … . Tracing cloths are fine close woven fabrics, usually of cotton or linen, which have been treated (e.g., with a … . Prepared painting canvas, usually of linen, hemp or cotton, sized and then coated on one surface with a mixture …