I am loving Stillman & Birn! I received a sample pack of their paper and put it to the test. It stood up to erasings, acrylic and watercolor washes and collage with nary a paper curl. I used the backside of the paper so I could make use of their paper information. Now I want a tank top that says this on it. Oh, and kudos to Stillman and Birn for the whitest paper I have ever seen. Seriously white. It is truly beautiful... clean.... fresh... and beckons you to paint on it.