Bromoil was developed in the early years of the century to enable 'control' to be exercised over straight black and white silver prints.
<Context ref.>AlternativePhotography.com : Bromoil and Oil Pigment Printing. [En línia]. [Consulta: 4 juliol 2005]. Disponible a: <http://www.alternativephotography.com/ process_bromoil_oil.html>