Sulky Solvy washes away. I have had great luck with it. Sulky also has a new opaque product called Fabric Solvy. It comes on sheets that can go thru the printer, then wash away after quilting. Supposedly it clings to the fabric, where the Sulky Solvy doesn't cling. I hope it doesn't gum up the needle, that is my main concern with it, other than the price. It was a bit pricey. I bought some, but have not tried it yet.