This unit process represents the production/service of 1JPY of miscellaneous glass and its products which are not elsewhere classified ,in Japan created from statistical information and other sources.
This product includes Glass Block, Glass Brick, Glass Tile, Glass Floating Ball, Glass For Watches/Glass For Spectacles, Glass Insulator, Glass Ornaments, Quartz Glass Products, Multicellular Or Foam Glass . The system boundary of this process is "(other nonferrous metal ingots and other inorganic chemical industry products etc.) -> compounding/melting/molding -> packing."
Optical/ophthalmic lens is classified as <31>.