I tried writing on the back of a glossy pamphlet I found in my mailbox. The results were surprisingly good. The nib just glides like butter, and the ink shows excellent color and shading. (Whether or not it's smudge proof I haven't determined yet.) There were no starting issues generally attributed to a lack of capillary action, and the ink was absorbed readily into the paper. However, a search on this forum revealed the experience with glossy printer paper tends to be mixed. So what kind of paper is being used for these pamphlets?