Painting on bare wood and MDF can turn out beautiful pieces. If it doesn’t say what the board type is, and it’s an inexpensive brand, it’s probably over cardboard. How do you keep this from happening with canvas boards? Read the fine print, make sure it says its a canvas over MDF or compressed board. When this gets wet and stays wet as in acrylic pouring, the glue starts to melt and lift from the cardboard, leaving you with bubbles, waves or complete separation from the board. This can happen sometimes with the cheaper canvas board, and the reason is simple. Have you ever purchased a canvas board and after it dried you find out that the canvas has actually buckled? Take a look at this picture, its shows a corner that has pulled away from the board. See how the edges are not painted, this one pooled in the middle and left the edges without paint. You will not have the issue pictured here if you do these simple things.ĭon’t give them any excuse to pool in the middle. First, be sure they are canvas over MDF board second make sure they are perfectly flat prior to pouring and last make sure you lay them on a flat, even surface to dry. You may use a canvas board to pour on, this is fine as long as a few things happen. They help stretch the canvas or lock in the canvas, either way making the canvas itself nice and tight. Be sure again to let it completely dry before you paint on it.Ī stretched canvas where your pour seems to pool in the middle as it dries, is too loose.Ī larger stretched canvas may come with some wooden tabs, what are they for? These are so you can add them to the inserts on the back of the canvas, especially if there is any loosening of the canvas that the water trick doesn’t help. If this doesn’t work, you can take out the staple and while still damp, try to re-fold and then restaple. You can dampen the corner with the spray water bottle, and try to smooth it out. Occasionally, especially with the bargain brands of canvas the corners might not be smooth. If it’s just a little loose, you can spray it and let it set overnight and that may do the trick as well. You don’t want to burn the canvas by holding it in the same spot. Make sure you continually move the dryer across the back of the canvas till dry. Try spraying a little water on the back of the canvas and using a blow dryer to dry it. Stretched Canvas ConcernsĮven brand new stretched canvas can be loose in the center of the canvas. So, here are a few things I learned along the way about stretched canvas, canvas boards and painting on bare wood or MDF boards. Some artists are so proficient that they don’t think about problems they might occur when pouring, but for the rest of us, sometimes we just need a little help.
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