Bluewhippet Arts' Top 5 Tips for Squaring your Canvas
Stretched Canvas is Square Right!? Here are some tips to make sure they remain so...
Measure the stretcher canvas frame before working on. Using an expanding tape measure, check diagonally across the frame from L to R and R to L respectivly: the numbers should equal. If they do not match, first remeasure, than a light tap on the corners with a mallet could help.
If priming raw canvas with Gesso, or applying another coat for acrylic and watercolour painting, and the gesso seems too thick, you can dilute slightly with water. Dry coats can be lightly sanded by hand with a fine sandpaper for a smoother painting surface.
Start applying gesso from the middle of the canvas first, drying times vary in different conditions and your canvas can start to warp.
What are those wedge shaped bits of wood? Stretcher wedges fit into pre machined slots on the inside corners of your stretcher frame, if after painting, the canvas starts to sag in any area, the wedges can be hammered in further thus expanding the corners, making the canvas surface taut.
You have worked on your canvas, your painting looks great! but the surface is dented or slack, Try a light spray of water on the back of your canvas, the weave of the canvas will tighten naturally as it dries.