How to Assemble and Stretch an Aluminum Tri-Mar Stretcher
Measuring and Stretching Finished Paintings
Stretcher Assembly
Canvas Stretching Tutorial
Keying Out Stretchers to Tighten Surface
Stretching Canvas with Pliers
Tips on Stretching
Our bars cannot twist or warp, but you can still overstretch. Always stretch your canvas taught…not tight. Use the keys to make it tighter for painting. This is done to compensate for shrinking from both paint build up and humidity. Remember, you can always make your canvas tighter, but you can’t make it smaller…so stretch accordingly.
Note...the biggest causes for warping or inflection are overstretching and weather, specifically humidity.