- Hass Manufacturing Company
 - Manufactures computer-controlled mixing valves to provide constant temperature flowing water. - Lici Colorstar
- Manufactures colour analysers, timers and accessories for photographic darkrooms.
 Meopta UK
- Specialises in darkroom enlarging equipment, enlarging lenses, copystands, and copy stand lighting.- Rockland Colloid Darkroom Products
- Makes a line of special photographic materials including Liquid Light photographic emulsion and Halo-Chrome silver toner.
- Summitek Photographic Supplies
- Products for photography professionals and advanced amateurs, including darkroom easels, archival print and film washers, and other accessories.
- UltraStable Color Systems,Inc
- Manufacturer of carbon pigment films for making permanent, non-fading colour photographs and digital prints.
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