The paper presents the open-bath method for safe solvent cleanings and reports on the design and operation of the prototype solvent-cleaning unit, commissioned by the Textile Conservation Department of the North West Museums and Art Gallery Service, and installed at its Blackburn (Lancashire) headquaters in 1986. Specifications are included, as well as a description of working methods, volumes of solvents required etc. Photographs, diagrams, and suppliers information (UK addresses).