The Photographers Formulary Gold 231 Toner is capable of producing a wide range of colors.
When used alone, Gold 231 gives deep blue tones. When used after sepia toning, red colors are produced whose brilliance are determined by the type of paper used.
Partial toning in Hypo-Alum Toner followed by Gold 231 gives blue-black shadows and soft reddish highlights.
Gold 231 toner contains ammonium thiocyanate and gold chloride. The chemicals in the kit are used to make a working solution. The capacity is determined by the method of toning.