The standard describes the preparation of a hot water extract for investigations of certain extractives in paper and board intended to come into contact with foodstuffs.
DS/EN 647:1994 history
1993DS/EN 647:1994 Paper and board intended to come into contact with foodstuffs. Preparation of a hot water extract
1993DS/EN 647:1993 Paper and board intended to come into contact with foodstuffs - Preparation of a hot water extract