[TECH]:: Specific gravity of major plastics / DENSITY / MASSA JENIS PLASTI= K Three near identical tables but with a mixture of typos suggesting an original different source ie no one is obviously the source of the other two. eg Untilled and Potyphenaline. http://www.tfmconsultants.com/specific_density2.html http://www.plasticsusa.com/specgrav2.html http://www.plastic.web.id/forum/density-massa-jenis-plastik I'll let them off including Urethanes under Plastics - they did note "elastomer". I'd expect the full range of Urethanes to have a far wider SG range than shown. Use with care. eg ABS comes in a range of densities depending on noted application - these are probably due to the use of apposite fillers despite a filler not being noted. .. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .