WEB EXCLUSIVE: New & Improved Dyna-Purge M is an upgrade of the most versatile and widely used purging compound from Dyna-Purge Div. of Shuman Plastics, Inc., Depew, N.Y. This non-abrasive, non-chemical thermoplastic compound for injection molding and extrusion boasts enhanced cleaning power with two nonmelting but softening ingredients that scrub while a proprietary additive helps remove contamination without leaving a residue. One previous user of Dyna-Purge M, custom molder LeVic Plastics, Inc., Grandview, Mo., found that the new formula requires 30% less purging agent to do the job. Another user of the original formulation, precision molder Tri-Tec Corp., Darien, Wis., says the new version cleans its machines with less material and reduces post-purge time by 25%.