The pen is make of the corn-starch, it is degradable and Environment friendly.  

Teh boll pen have excellent physical, chemical property and 100% fully biodegradable property (ISO14855: 45 days ≥weight- loss rate 73%, 94 days ≥weight- loss rate 90%), and they are eventually broke down into CO2 or H2O; This kind of product has passed the tests of international standard and obtained the international certification for environmentally friendly product (Environment MARK, referred to as E MARK). Compared with the same kinds of products produced by those large chemical firms overseas, BSR products have distinct advantages of offering the most at the best price.

Biodegradable Boll Pen