Harry Yohn has been a product applications specialist for Tinius Olsen in Horsham, Pa., since 1996 and has nearly 25 years of experience in mechanical and physical testing of plastics.

Harry Yohn has been a product applications specialist for Tinius Olsen in Horsham, Pa., since 1996 and has nearly 25 years of experience in mechanical and physical testing of plastics. He is chair of the ASTM Subcommittee D20.30 on Thermal Properties of Plastics, Subcommittee D20.10 on Impact Properties, and several task groups within the committee. Contact him at (215) 675-7100 • hyohn@tiniusolsen.com.