Bradley, A. and Cooker, M.J. and Dellar, P.J. and Fitt, A.D. and Fowler, A.C. and Keener, J.P. and King, J.R. and Lacey, A.A. and Lee, W.T. and Mitchell, S.L. and Richardson, G. and Vynnycky, M.  (2011) Foam formation in the plastics industry.  [Study Group Report]