With VersaChalk Classic Purple Bold dry erase markers, it is easy to create any note or masterpiece without fear of smearing. The professional quality ink within the purple dry erase markers is non-toxic and easy to clean up. It is also dual sided so that you can create larger or detailed strokes with ease. Cleanup is made simple! All that is needed is a damp paper towel or chalk eraser. The purple dry erase markers are suitable for all ages and can be used on a variety of materials such as chalkboards, plastics, glass, etc. We recommend that you try it out beforehand because it will leave permanent marks on non-porous materials such as wood and paper.