Photographers' Formulary Ferric Chloride (10g) Tweet Description This is 10g of Ferric Chloride from Photographer's Formulary. It is commonly used as a reducer or in blue toners. Details Additional Category Tags: Chemistry, Alternative Process & Miscellaneous Chemistry Category: Photography Manufacturer Catalog Number: 10-0520 10G Product Manufacturer: Photographers' Formulary Subcategory: Darkroom Equipment