Stiffening Linen and Canvas
GOLDEN GAC 400 functions very well in stiffening fabrics, especially cotton canvas. However, it is less effective on linen. It will not become increasingly brittle over time, and is not hygroscopic like rabbit-skin glue. Resolubility of the hide glue can be a problem if a waterborne acrylic gesso, paint or medium is applied over the glue, causing poor film formation and possibly delamination from the support.
Maximum stiffness is achieved by stretching the canvas, and applying a coat of GAC 400 to the front. The result should be a canvas that has significantly less "bounce" when painting. Care should be taken if rolling the canvas for shipping or storage as the loss of flexibility will increase the risk of cracking. To minimize this maintain the largest diameter possible and roll with the painted surface pointing outwards.