Three-colour photography: three-colour printing and the production of photographic pigment pictures in natural colours (1904)
Hübl, Arthur, Freiherr von, 1853-1932, Klein, Henry Oscar · London, A. W. Penrose & co. · leaf 189
PENROSES Spectroscopes. Direct Vision Principle. Specially suited for Three-colour Process Work. … The Camera Spectroscope. With Comparison Prism, £3 35. A simpler pattern, without Comparison Prism and case, £2 2s. Focussing Pocket Spectroscope, in case, £2 2 o. Pocket Spec- troscope, with fixed slit and draw-out tube, The same, with adjustable slit and dust-proof covered ends, 30/- THORP'S…
Color photography -- Three-color process
Internet Archive · University of California Libraries · Public domain (published before 1931). Free to use for anything.
![An illustration from [Catalog]. (1908)](https://img.insideoutlibrary.com/img/200/ia-catalog00macy-292-884.webp)
