QUILL polypropylene cover visual art diarys features genuine high quality cartridge paper. The strong twin loop spiral binding is concealed to provide a sleek and modern look. Not just good looking, the Art Diary is easy to use when travelling or when no desk is close by. The front cover folds back to provide a strong, stable platform to capture the moment of inspiration or observation The paper is acid free so you don't have to worry about discolouration occurring in your work over time These diaries feature a durable polypropylene front cover and a sturdy backing board These diaries are spiral bound so that it can be opened flat or folded back for convenience