Hajime Yoshida (Senior Researcher), the Pressure and Vacuum Standards Group, the Research Institute for Engineering Measurement (Director: Toshiyuki Takatsuji), the National Institute of Advanced Industrial Science and Technology (AIST; President: Ryoji Chubachi), and Takeo Ebina (Prime Senior Researcher), the Research Institute for Chemical Process Technology (Director: Satoshi Hamakawa), AIST, have developed standard gas barrier films (SGB films) with a water vapor transmission rate of 10-6 g m-2 day-1 level. The SGB films are prepared using a barrier film with an ultralow gas transmission rate that is made from clay and polyimide.
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