1Sketch paper is applicable to oily, waterbased oil pastels, color pencil, and marker pen, which can be impervious to bottom. 2Add one more of butter paper to each page of the drawing paper can effectively protect the painting and prevent the painting from contaminating the back page and staining the work. 3Practical, ring-shaped binder design can replace the inner core to add pages, etc. 4The drawing paper can be added to tear the dotted line to facilitate the frame of the work. 5Made of materials in high quality, sketch paper is easy to use in the practical life, which makes itself getting great popularity.