Two-stage extraction saves time, removes more water. Membrane assures uniform extraction. Extraction is divided into two brief stages – pre-press and main press. In the first, a tamper removes most water quickly but gently. Water exits freely beneath the load, at the sides, and through the top of the tamper. The pre-press basket has large holes for fast initial water removal and lower final moisture retention. Compare this to systems using unyielding steel plates. With those machines, if the batch is lumpy or pyramid-shaped, full pressure is applied only to the high spots. Other areas are left...