7. Apparatus 5
7.1 Compression Device:
7.1.1 Two circular platens with a diameter of 30.0 6 0.1
mm (1.181 6 0.004 in.) and a thickness of at least 2 mm (0.08
in.) mounted in an angle iron frame, are facing each other
horizontally. The upper platen can be vertically moved and
raised at least 14 mm (0.55 in.) above the lower platen to
permit insertion of the 13-mm (0.51-in.) high test piece.