ASTM D 2227 - 96 (Reapproved 2015) Standard Specification for Natural Rubber (NR) Technical Grades

Current edition approved Sept. 1, 2015. Published December 2015. Originally approved in 1963. Last previous edition approved in 2011 as D2227 – 96 (2011). — 2 p.
This specification covers minimum physical and chemical quality requirements or specifications for five grades of raw natural rubber.