GRA - Grace doubles Ludox colloidal silica capacity as European plant opens June, 23 2020 12:37 PM W.R. Grace & Co. W.R. Grace (GRA +0.7%) says it opened its new 8,200 sq. meter colloidal silica plant at its European flagship manufacturing and R&D center in Worms, Germany.More news on: W. R. Grace & Co., Read more ...