for Three=Colour Work. OPEN ANDENCLOSED TYPES. Penrose Process Open ArcLamp on Standard. THREE-COLOUR WORKERSshouldinvestigatethe meritsofourNew Ultra Arc Enclosed Type withHot Wire Regulation. … Penroses Double Carbon OpenArc Lamp. No Clockwork. No Magnet Coils. Burns equally well on Alternating or DirectCurrent. Can be changed for Violet, Green and Red Rays. Effective Reflector. On all Arc Lamp Matters for Process consult PENROSE & CO., 109, Farringdon Rd., London, EX. Tallents…
Color photography · Color printing
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