NOVELTY - A forming apparatus comprises adjacent forming tools of one forming tool set (3) movably supported on part of circuit immediately before or after a pressure forming zone such that the only relative movement of the adjacent forming tools is towards or away from the forming tools of the other forming tool set (4) with which they co-act.    USE - For forming a material, e.g. polycarbonate, polymethyl methacrylate or general purpose polystyrene for liquid crystal display substrate, ultraviolet-stabilized thermoplastic polyurethane for roofing tile or substrate, thermo-formable material for container or substrate, material for photovoltaic cell or optical media (e.g. compact disk or DVD).    ADVANTAGE - Co-acting tools may be removed with no shear between them present. This extends the tool life, particularly when the data is stamped into the material.    DETAILED DESCRIPTION - A forming apparatus comprises a first forming tool set; a second forming tool set where each second forming tool co-acts with a first forming tool to form a co-acting forming tool in a pressure forming zone; a first forming tool set guide (5) about which the first forming tool set can be moved about a first circuit; a second forming tool set guide (6) about which the second forming tool set can be moved about a second circuit; primary drive (7) to move, in serial progression, the forming tools about the guides in a machine direction. At least on part of the circuit immediately before or after the pressure forming zone, adjacent forming tools of one forming tool set are movably supported such that the only relative movement of the adjacent forming tools is towards or away from the forming tools of the other forming tool set with which they co-act. INDEPENDENT CLAIMS are included for:    (1) a method of forming a material; and    (2) a roofing tile, material or substrate, liquid crystal display substrate, container, photovoltaic cell, or optical media formed by the method.    DESCRIPTION OF DRAWING(S) - The figure shows in side elevation a forming apparatus.    Forming tool sets (3, 4)    Forming tool set guides (5, 6)    Primary drive (7)    Second drive (8A)    Second position (8B)    Secondary drive (59)