Interesting article https://www.theconservationcenter.com/articles/rolled-together-separating-paper-parchment-documents?mc_cid=e9c3a71b89&mc_eid=2d46d14067 -- Mark Arend Oshkosh, Wisc. Outside of a dog, a book is man's best friend. Inside of a dog it's too dark to read. --Groucho Marx