Increased consumption of fossil fuel such as petroleum, coal etc. turns into an increase of carbon-dioxide emissions to atmospheric environment, and that increase is said to be a cause of global warming. This global warming is further said to cause decrease of ice around Arctic Circle, huge hurricanes, spread of desertification and other abnormal weathering phenomena. Then, reduction of carbon-dioxide emissions has been the one of the biggest issues for human beings.

 Responding the above situation, many research works have been started to utilize plant-origin materials. The plant-origin materials are so-called "carbon neutral materials", since carbon contained in the materials are originated from carbon dioxide gas absorbed during their growth. We have developed a coating based on modified corn-starch without spoiling any required performance levels, and the developed coating has already been commercialized for a home electric appliance