Conforms to ASTM D 4236 and EN71-3-9， REACH regulation registered. Safe， non-toxic and eco friendly. MEMORY certifications: Oil pastels is an oil painting tools， and is usually about 10 cm long cylindrical or prismatic. These oil pastels feel fine and smooth， spread well， and have excellent overlapping color and mixing performance.It is hard to break and form debris. Their color is bright. With the most prominent ultra thin thickening coating material， the coating has better texture， thus is able to fully demonstrate the effect of painting， and inspire infinite creativity. They meet the requirements of a variety of painting techniques， oil pastel and hardness. MEMORY oil pastels apply ultra-low temperature ammonia technic to refrigerate， so each oil pastel with closer molecular structure and greater density. Its single weight is about 8.5g. Anti-breaking strength is no less than 4N， more difficult to be broken or worn and torn. MEMORY oil pastels has conformed U.S. ASTM-4236 and European EN71 non-toxic， safety and quality testing. Oil pastels seem like crayons， but it is not crayons. Compared with crayon， oil pastels' colors are brighter， stronger adhesion on paper. It is one of the children's favorite painting tool. Use oil pastels tips ( Find more "oil pastels techniques" in search engine) 1. Tap with oil pastels on paper to form a colored dot. 2. On the edge of one color， and then paint another color， then use your fingers or paper to mix two colors. 3. Before painting on paper， you can mix colors on the palette.