Preparing Unprimed Cotton Canvas for Use: Artists, generally the more accomplished, often prefer to use unprimed cotton canvas over any other. Many artists like to prime their own canvas before beginning their work. Unprimed cotton canvas can be purchased in any volume. Some simply buy the amount needed for the project at hand while others purchase the unprimed cotton canvas roll. Priming canvas is rather easy.
The canvas becomes smoother with each coat of primer that is applied. To prime a canvas, try using the technique that follows:
Before priming a canvas, stretching must be completed.
Most artists use gesso for priming. It is suitable for painting with acrylic and oil paints. It tends to dry rapidly and can be applied directly to the canvas.
Always shake the gesso container rapidly and for up to a minute before using. Never forget to perform this step. Your priming efforts will be destroyed if gesso is not shaken.\
Be sure to that you have enough gesso for the amount of priming you wish to do. Only one coat will leave your canvas rather rough.
For more than one coat of gesso, you can dilute the product. Use a blend of half water and half acrylic gloss medium.
Select an old clean brush that is wide.
Begin to apply gesso in strokes that are even. Start at the top of the canvas moving to the bottom. Use parallel strokes working from edge to edge.
Continue the process until the whole canvas is covered with gesso. Allow to dry.
Wash your wide brush as soon as you are finished with the last stroke. Gesso dries quickly. It will not wash out of your brush if allowed to dry.
Remember to allow your first coat of gesso to dry completely before applying a second. This allows for a smoother surface. Any rough spots that were found on the canvas during stretching should have been smoothed using a nail file or sandpaper. Smooth surfaces make for ease in delivering a professional piece of artwork.