Preventing Buckling

Opus Student Watercolour Paper

For the next test, I wet the back side of the paper and taped it to glass, in an attempt to stop the buckling.  (Paper buckles when it gets wet on one side only).  This worked really well and I had so much more fun when the paint didn't run into the valleys caused by buckling or over to the edges.  

This worked so well for this Opus cellulose paper that I wondered how the XL paper might perform.  It seemed to work while I was painting, but I was surprised that as the paper dried, it glued itself to the glass and wouldn't come off without tearing.  

Canson XL Watercolour Paper