Polyfill, sold as quilt batting, is spun polyester. As far as I know it should be as chemically stable and preservation-worthy as other polyester things, such as Stabilitex and Melinex. I don't know about additives to this form of polyester that could come into consideration, though. And I wouldn't consider any other kind of spun synthetic fiber.Originally posted by framinzfun:
Is the polyfill archival, I'm thinking of the batting that you can get for quilting? And what types of fabric are chemically neutral?