A sample of 6 x ½” (152 x 12.7 mm) is prepared by means of a sample punch. It is inserted into the sample inlet at the top of the instrument. When the start button is pressed, it is introduced and molded by the heated riffle plates. The sample is then ejected from below and can be taken out. The riffle plates return to their initial position. It is important that the sample has the correct width of 12.7 mm.