The high market potential of environmental friendly pens In the modern society, pens are needed by everyone. With the following of environmental friendly, low carbon dioxide, envrionmental friendly and easy to wipe pens also come into our lives, and in hot sale based on its advantages. The environmental friendly and easy wiped pens can easy to write and also easy to wipe, and the words writed on the paper can be easily to wipe in 2-3 days, which...