Posted on June 23, 2015June 23, 2015The Coolest Watermark Ever Detail of a sheet of Katie MacGregor’s handmade paper. My collection. Papermaker Katie MacGregor’s structure of cellulose watermark. (C6H10O5)n rules! Share Email a link to a friend (Opens in new window) Email Share on Pinterest (Opens in new window) Pinterest Share on Tumblr (Opens in new window) Tumblr Share on X (Opens in new window) X Share on Facebook (Opens in new window) Facebook Like Loading...