Originally Posted by
SallyS
I've used wool batting on top of Warm & White in art quilts, and I'm not going to do it again.. No adjustments were necessary, but when I blocked the quilts, the wool batting shrunk much more than the cotton fabrics in the top, creating wrinkles. If I decide to use it anyway, I'll preshrink the wool batting.
There is wool batting and there is wool batting, most manufacturers have the specs if you go to their websites. For example, Hobbs specifically states not to prewash some of their wool batting and also gives you the amount of shrinkage to expect when the quilt is washed. There is also washing and drying directions like "always wash in cool or cold water, dry on air or low and lay flat to finish drying. This varies amount the wool battings.