Fotospeed ST20 Odorless Vario Sepia Toner can produce a wide range of sepia tones on Fibre & Resin Coated B&W papers. It comprises three parts: Part 1
- Bleach; Part 2
- Toner; Part 3
- Toner Additive. Parts 1 & 2 mix separately to make two working solutions with Part 3 being added in it's concentrated form to Part 2 working solution to adjust the shade of sepia required. Part 3 is needed to activate the toner.