1.1 This standard specifies four methods for measuring the density and specific gravity of non-foamed plastics in the form of sheets, films, tubes, articles, molding powders, granules and pellets: do. …
JIS K 7112:1999 history
1999JIS K 7112:1999 Plastics -- Methods of determining the density and relative density of non-cellular plastics
1980JIS K 7112:1980 Methods for determining the density and specific gravity of plastics