The properties of a thiocyanate free gold latensification solution are explored. A dilute solution of potassium tetrachloroaurate (III) produces photographic speeds almost as high as the conventional gold latensification formulation that contains potassium thiocyanate. During latensification, gold plates onto sub-image centers rather than replacing silver in those centers.
Shanthi Trettin, H. E. Spencer, "Thiocyanate Free Gold Latensification" in Journal of Imaging Science and Technology, 2002, pp 64 - 66, https://doi.org/10.2352/J.ImagingSci.Technol.2002.46.1.art00008