Photography
About the year 1820 Nicephore Niepce made the discovery that bitumen, under certain conditions, was sensitive to light. He dissolved it in oil of lavender, and spread a thin layer of the solution thus obtained upon stone. This he exposed under a drawing (making the paper trans...
"Photogravure, or Photographic Etching on Copper." By Herbert Denison. A lecture delivered before the Photographic Society of Great Britain. Printed in THE PHOTOGRAPHIC TIMES, A...
8. CHAPTER II.Regular transparency gelatine dry plates are the handiest for making positives, especially for amateurs, if one does not care if the subject is in reverse, or if one has a rever...
7. CHAPTER I.Any negative may be used for photogravure, that is, taken from nature, or from a painting or engraving, provided it is reversed, and, in the case of paintings, should, in additi...
12. CHAPTER VI.Perchloride of iron C.P. is the acid generally used for this purpose; it is a still acid, and if the room is well ventilated no harm to health results, but care must be taken to...
10. CHAPTER IV.The best copper is recognized by its rosy lustre. Pure copper only should be used. It can be purchased ready polished and beveled from several firms in New York. The best way, i...
11. CHAPTER V.Have a wooden box made 24 inches long, by 12 inches high, 12 inches wide, with door 6 inches high on side, fastened with hinges, top and bottom of box open; cover top with sheet...
6. CHAPTER X.--Books and Articles on Photogravure, 1888-1893, 44About the year 1820 Nicephore Niepce made the discovery that bitumen, under certain conditions, was sensitive to light. He dissolved it in oil of lavender, and spread a thin lay...
9. CHAPTER III.The carbon tissue used as a resist, which is mounted on the copper plate, is made by the Autotype Company, London, England. No. 100 Standard Brown is the right grade to use, tho...
14. CHAPTER VIII.Before final finishing by hand a working proof should be printed from the plate by an expert plate printer, by which, what the plate needs can be determined before final proving.
15. CHAPTER IX.Printing Frame (deep), 8 x 10, screw pressure, $8. Roll Carbon Tissue, No. 100; Standard Brown, $3. Johnson Actinometer, $1.25. Beaume Hydrometer, $1.25 (with glass). Silver " (...
13. CHAPTER VII.When the biting is finished rapidly place the plate under the tap and rinse thoroughly, breaking away the film with your fingers; it seems to have rotted under the action of the...
1. Chapter XII.--Photographing on Wood and Other Processes.3. CHAPTER II.--The Transparency.--The Carbon Process.--Cutting4. CHAPTER IV.--Cleaning and Graining of the Copper Plate Plate--2. CHAPTER I.--The Negative.--Quality best Suitable.--Necessity5. CHAPTER V.--Development of Negative Resist on the Copper