Aiming for a high tech facility farming industry in the 21st Century, Boojun has developed "Aluminum Screen" through long time study and field adaptation tests. It is a green house type curtain which is made by mixing aluminum, twisted threads, and polyethylene and is well known for its excellent effects of heat retention and light shading. In summer, it maintains the optimum temperature for farm products by controlling temperatures indoor or terrestrial heat of solar rays through aluminum reflection effects, and it keeps heats inside to effectively protect heat emission in night or in winter, contributing to an innovative energy conservation.