PUR facts : conservation of polyurethane foam in art and design - Oosten, Thea van (Amsterdam University Press, 2011)
"Flexible polyurethane (PUR) foams have been used from the 1950s onwards and can be found in museum collections as art and design objects, in textiles and in furniture upholsteries amongst others. These objects composed from "short-life" consumers materials, show severe conservation problems due to ageing."–Back cover