Review on 🎨 Arteza Canvas Boards for Painting: Pack of 14, 11 x 14 Inches - Blank White Panels, 100% Cotton, 8 oz Gesso-Primed - Ideal Art Supplies for Acrylic Pouring and Oil Painting by Amy Mcleod

To answer your question, no, it won't make your oil painting of fat Elvis naked eating a bowl of peanut butter any less traumatic for viewers, but it will make it less traumatic for you creating such a crime against humanity and then flaunting it for a decent length of time. Is it better than stretching your own canvas for durability, no, but for something quick and easy, do it. They're great for students, kids, for practice, or even for masterpieces that future museum restorers will despise you for. So, if you have peace of mind that 400 years from now, when you're long dead, the glue connecting the canvas to the cardboard may fail, or said cardboard may deteriorate, then go for it. Grandma will still love your painting and so will your therapist.