Canson Artist Series Watercolor books feature Canson's mould made Montval cold press watercolor paper, which performs beautifully with all media. Each wire bound book contains 20 sheets of heavyweight 140lb paper that is micro-perforated for easy removal. The surface withstands scraping, erasing and repeated washes. These books feature a removeable half sheet with tips and techniques from some of the most noted artists of the day. After removal, the sheet can be used as a bookmark. Imported