Winsor & Newton - Universal Stretched Canvas - Twin Pack - 20x30 in - The Winsor Universal Canvas range offers the artist a good quality, acid free, cotton canvas that has been double coated with primer. The canvas is of medium grain and is made from 100% cotton.
This range consists of canvases in twin packs. The canvases are for general use with oil (including water mixable) acrylic and alkyd colour.
Please note that all Winsor canvases are supplied with wedges. Wedges are used to expand the stretcher if the canvas slackens in adverse weather conditions. Wedges should be placed in the corners and tapped in with a pin hammer. The use of wedges is not a common requirement.