When sourcing a cold press, you must prioritize the nominal pressure (measured in tons) and the effective working table size. For standard woodworking, a pressure of 50 to 100 tons is common, but high-density laminates may require more. Ensure the cylinder stroke matches your maximum workpiece thickness and verify that the platen flatness error is within ±0.1mm to prevent uneven bonding. Additionally, look for machines equipped with automatic pressure maintenance systems to ensure consistent quality during the long pressing cycles.