I recently ordered a Fredrix Red Label canvas. This canvas is rougher than what I usually work on. I bought it because I'm planning to do an impressionistic piece. I learned from Lisa Clough of Lachri Fine Art that this particular canvas is more suited to that style than the Green Label I'd been buying. This is because I'm probably going to want to use heavier globs of paint when working in this style, which the Green Label, which is linen, wouldn't be able to take.
You want to select a lightweight, smooth canvas for realistic pieces that rely on fine detail. Some cotton canvases work for this, and linen is excellent. Go with a rougher canvas for more impressionistic styles, impasto techniques, or painting with a palette knife. Anything that says heavyweight is your best bet.
It’s difficult to do fine detail on a rough canvas. Your lines won’t be smooth. On the other hand, a smooth canvas may be too lightweight to take all the globs of paint required for certain impressionistic styles. I’ve also heard it’s hard to blend smoothly on a rough canvas but easy on a smooth one. Blending isn’t such a concern when doing impressionistic work, but it’s a big concern when doing realistic work.
Below is Lisa's video on which Fredrix canvas is best for your painting style, which is where I got most of these tips.
Painter of portraits and wildlife