electroless metal deposition multi-metal deposition A development method where the substrate is first immersed in a colloidal gold solution (containing negatively charged gold particles) at low pH. Gold subsequently deposits on any organic molecules containing postively charged groups at this pH. In the second step, the surface is treated with a solution containing silver acetate and hydroquinone which causes the reduction of silver ions, producing a silver deposit on the exisiting gold layer. multi-metal deposition is used to enhance latent fingermarks. multi-metal-deposition MMD CHMO:0001334 multimetal deposition