Supplier of printing, engraving and photographic chemicals and consumables; camera manufacturer; established as a 'Process Chemicals Stores' in 1893 by Arthur William Penrose in Clerkenwell, as an offshoot of a pharmaceuticals business established in the 1830s; moved to Farringdon Road in 1901; incorporated as limited company in 1905; acquired by Hunter & Co in 1927 to became Hunter Penrose.