[quote=Shelley
Well, I don't think wool is supposed to shrink. So I don't thing that would be a problem. If you wash, and don't want shrinkage, use cold water, then block on something rigid. When I block quilts, I use foam insulation boards. [/quote]
Wool WILL shrink. It will felt if there is enough agitation while it is being washed, so the secret to keeping wool in the trapunto anywhere close to what you started with, quilt in tub for washing, a few swishes (in cold water, as Shelley suggests) ... lay it out to dry ... Felt comes from wool that has been washed in hot water and soap with lots of agitation and then dried with a high heat ... if you use wool inside your trapunto, check out care instructions for a wool sweater, and then you will know what to expect from wool yarn or fabric.