HOUSTON--(BUSINESS WIRE)--Changing Technologies, Inc. (OTCBB: CHGT) will unveil a new 3D printing process that will hide unsightly build lines on finished models - resulting in end products that look more like traditionally manufactured molded parts and that slice costly post-processing expenses. “In the past, build lines have given 3D-printed products a rough, often unappealing finish,” said CHGT CEO Marco Valenzuela. “Our new, proprietary process effectively disguises those lines. The results