VTC BD-25 is mainly in the form of granule, and refined from ground seashells. BD-25 contains a large amount of chitin. Through high temperature and special dehydration, chitin is transformed into chitosan. BD-25 is one of important natural microscopic organisms and non-toxic. It possesses good adhesivity, biological compatibility, biodegradability and special absorbability. It features its nanograde biodegradable plastic additive. The addition of BD-25 in a proportion of 20%~60% will change the constituents of all plastic ware. BD-25 is a 100% degradable and non-toxic substance – low carbon and low pollution. It is made from abandoned shells. It is not made from edible starch. No grain will be wasted. BD-25 after degradation can be served as organic fertilizer to balance the pH value of soil. It doesn’t hurt crops or burden environment. It is environmental and recyclable.