banche

CONT: For many years wallboards and plywoods of various kinds were used as form-linings. About 1936 a new technique was developed whereby one thick board of resin-bonded plywood was made to serve the dual function of sheathing and form-lining; within the space of a few years the use of plywood as form material had become universal ... Plywood formwork panels to produce varying degrees of smoothness on the faces of poured concrete are readily available.