Berg RAPID RC SEPIA Toning Solution is an odorless toner, useful for restoration work, flesh tones in portrait and hand coloring studies, and wherever a warm brown tone is appropriate. Toning is accomplished within about 5 minutes depending on the material.The first step in the two-bath process is treatment in the bleach bath. The bleach bath, unlike other sepia toners, contains no ferricyanide. After a brief wash, the image is rapidly toned in the toning bath. Then just wash and dry. Berg RAPID RC SEPIA Toning Solution will tone all silver-based black and white paper and films and works especially well on all resin-coated papers. The toned image is permanent; however, the toned image may be easily reversed to the original black and white. Partial reversal leads to unusual creative results, as does multiple toning with other Berg toning products.