Collodion emulsion and its applications to various photographic and photo-mechanical purposes with special reference to trichromatic process work

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Penrose & Co., 1905 - Photography - 95 pages
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Page 40 - Dissolve 2\ ozs. of sodium sulphite in 4 ozs. of water distilled (hot), and add 1 oz. of glycin and 5 ozs. of carbonate of potassium. The order of mixing as stated above should be carefully followed. The solution forms a thick paste, and will keep for years, if well stoppered. For use dilute : — 1 part of glycin paste with 12 parts of water. This forms the usual developer. Hydroquinone. A. Water, distilled 20 ozs. Sulphite of sodium 10 ozs. Carbonate of potash 8 ozs. B. Hydroquinone 1 oz. Water,...
Page xiv - LIGHT FILTERS.— The luminosity of all colours exactly as seen by the eye. Sole makers of the Cadett, Gilvus, and Absolutus Filters for the Spectrum Plate. Makers of Orthochromatic Filters for all brands of plates. All sizes in stock ready for use. ORTHO FILTERS in sets in cases.
Page 87 - Pinaverdol, Ethyl-violet and Homocol can be mixed with the emulsion and it will still keep for a very long time, showing extremely clear working qualities. DEVELOPERS FOR COLLODION EMULSION. GLYCIN. Dissolve 2$ ozs. of sodium sulphite in 4 ozs. of water distilled (hot), and add 1 oz. of glycin and 5 ozs. of carbonate of potassium. The order of mixing as stated above should be carefully followed. The solution forms a thick paste, and will keep for years, if well stoppered. For use dilute : — 1 part...
Page xiv - Sanger-Shepherd Repeating Backs, with Light Filters. Applicable to Portraiture, and all subjects requiring rapid exposure in changing light. Maximum simplicity in exposing and developing the three negatives on one plate, from 7O/-.
Page xiv - FITTINGS for all sizes in stock in several patterns. Write for Lists. SANGER-SHEPHERD PROCESS OF COLOUR PHOTOGRAPHY.— All materials for taking and making transparencies from 26/-. Additional Outfits for making prints upon paper and white celluloid, etc.. can be supplied at small extra cost. Write for Booklets. Sanger-Shepherd Photo-Spectroscopes, Cameras, Museum Stands, Photo-micrographic Cameras, Instruments for Measurement of Light and Colour, Speed Determination, Rotating Sectors, Arc Lamps,...
Page v - SOLE AGENTS FOR GREAT BRITAIN . . . AW PENROSE & Co., Ltd., 109 Farringdon Rd., London, E,C, Branches : LONDON— 29, Margaret Street, Regent Street, W. Berlin. Frankfort o/M. Hamburg. Vienna. St. Petersburg. FOR PROCESS WORK, LINE, HALFTONE, and THREECOLOUR WORK, WE RECOMMEND OUR Jlpoeljromat - Planar s AND JlpoeGromat - ISessars Illustrated Price Lists, "P.Pe.
Page xxvi - Commercial and Press Photography. The Complete Lamp. Photograph of a Flash. ADVANTAGES : Quick Ignition. Wide-Spreading Fan-Shaped Flame. Great Intensity. Easy to Charge. Simple and Compact. Price of the " Electra" Flash Lamp, in aluminium, complete with Double Ball and Tube of best rubber 15/6 The P.
Page xx - Circular Cells. — These consist of a pair of optically worked plane-parallel plates of glass, with a separating ring of glass. PRICES — 2 in. diameter, 70/0 ; 3 in., 105/0 ; 4 in., 130/0, with Brass Holders to fit lens. Catalogues and Leaflets on Application. AW Pen rose & Co. Ltd., 109, Farringdon Road, London, BC *3for SHreet or Jndireet fsdree-eolour Work.
Page 91 - ... briefly summarised as below, and fuller details will be found in a book entitled " Collodion Emulsion," by HO Klein. Start with a stock of new glass, and immerse for a few hours in Potassium bichromate . . . . 2 ounces 80 grams Sulphuric acid . . . . . . 3 ,, 100 „ Water . . . . . . . . 20 ,. 1,000 cc. Rinse under the tap, and polish with an alcoholic solution of caustic potash or iodine, and finally polish with papier Joseph or with a clean pad of linen charged with a few drops of alcohol...
Page xxvi - Easy to Charge. Simple and Compact. Price of the " Electra " Flash Lamp, in aluminium, complete with Double Ball and Tube of best rubber 15/6 The P. & E. Portable Dark= Rooms and Dark Tents. For Home and Abroad. Invaluable for Home Use, Indoors or Outdoors. Indispensable for Touring, Hunting, Fishing, Military and Exploring Expeditions, Send for Complete Catalogue. The P. & E. Dark-Rooms can be obtained from all Dealers and Photographic Stores. Indoor Dark- Room from 4. 2 6.

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