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The photographic news
- Bandzählung
- 27.1883
- Erscheinungsdatum
- 1883
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- Englisch
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- Hochschule für Grafik und Buchkunst Leipzig
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- Hochschule für Grafik und Buchkunst Leipzig
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Zeitschrift
The photographic news
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Band
Band 27.1883
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- Titelblatt Titelblatt I
- Register Index III
- Ausgabe No. 1270, January 5, 1883 1
- Ausgabe No. 1271, January 12, 1883 17
- Ausgabe No. 1272, January 19, 1883 33
- Ausgabe No. 1273, January 26, 1883 49
- Ausgabe No. 1274, February 2, 1883 65
- Ausgabe No. 1275, February 9, 1883 81
- Ausgabe No. 1276, February 16, 1883 97
- Ausgabe No. 1277, February 23, 1883 113
- Ausgabe No. 1278, March 2, 1883 129
- Ausgabe No. 1279, March 9, 1883 145
- Ausgabe No. 1280, March 16, 1883 161
- Ausgabe No. 1281, March 22, 1883 177
- Ausgabe No. 1282, March 30, 1883 193
- Ausgabe No. 1283, April 6, 1883 209
- Ausgabe No. 1284, April 13, 1883 225
- Ausgabe No. 1285, April 20, 1883 241
- Ausgabe No. 1286, April 27, 1883 257
- Ausgabe No. 1287, May 4, 1883 273
- Ausgabe No. 1288, May 11, 1883 289
- Ausgabe No. 1289, May 18, 1883 305
- Ausgabe No. 1290, May 25, 1883 321
- Ausgabe No. 1291, June 1, 1883 337
- Ausgabe No. 1292, June 8, 1883 353
- Ausgabe No. 1293, June 15, 1883 369
- Ausgabe No. 1294, June 22, 1883 385
- Ausgabe No. 1295, June 29, 1883 401
- Ausgabe No. 1296, July 6, 1883 417
- Ausgabe No. 1297, July 13, 1883 433
- Ausgabe No. 1298, July 20, 1883 449
- Ausgabe No. 1299, July 27, 1883 465
- Ausgabe No. 1300, August 3, 1883 481
- Ausgabe No. 1301, August 10, 1883 497
- Ausgabe No. 1302, August 17, 1883 513
- Ausgabe No. 1303, August 24, 1883 529
- Ausgabe No. 1304, August 31, 1883 545
- Ausgabe No. 1305, September 7, 1883 561
- Ausgabe No. 1306, September 14, 1883 577
- Ausgabe No. 1307, September 21, 1883 593
- Ausgabe No. 1308, September 28, 1883 609
- Ausgabe No. 1309, October 5, 1883 625
- Ausgabe No. 1310, October 12, 1883 641
- Ausgabe No. 1311, October 19, 1883 657
- Ausgabe No. 1312, October 26, 1883 673
- Ausgabe No. 1313, November 2, 1883 689
- Ausgabe No. 1314, November 9, 1883 705
- Ausgabe No. 1315, November 16, 1883 721
- Ausgabe No. 1316, November 23, 1883 737
- Ausgabe No. 1317, November 30, 1883 753
- Ausgabe No. 1318, December 7, 1883 769
- Ausgabe No. 1319, December 14, 1883 785
- Ausgabe No. 1320, December 21, 1883 801
- Ausgabe No. 1321, December 28, 1883 817
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Band
Band 27.1883
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in and relating to the production of printing surfaces from gelatine reliefs.”—Dated 25th October, 1882. Our invention relates to certain improvements on what is known as the Woodbury process, namely, that process by which impressions of the gelatine reliefs are by pressure produced on lead surfaces. Previous to our invention it has been the practice to produce impressions from gelatine reliefs on lead plates brought to a true and even surface by placing such reliefs between the lead plate and a steel face plate, and applying hydraulic pressure in a suitable press, by which the impression of the gelatine relief was reproduced or impressed upon the lead plate, such lead plate, after trimming, serving as the plate or type for printing from. The use of the hydraulic press as a means of producing these printing plates or types renders the process expensive, and limits materially the dimensions of the plates, and necessitates each plate having perfectly true level and even surfaces, insomuch as it is necessary that the pressure which prints the impression from the gelatine relief on to the lead plate should be evenly applied over the whole surface of such lead plate simultaneously. According to our method of producing impressions on lead plates or sheets from gelatine reliefs, we take a plate or sheet of lead, and place above and beneath it sheets of steel, and out side these sheets of steel we place above and beneath other sheets of cardboard, so that the lower sheet is cardboard or other like material to give elastic pressure ; the next is steel; then comes the lead sheet or plate ; over this is the second sheet of steel; and lastly, the second sheet of cardboard or its equivalent. Having arranged the sheets as above, we then pass them between an adjustable spring roller press, until the lead plate is reduced to the limit of adjustment or sett of the roller press. By thus reducing the lead plate it is brought to a true, even, and proper surface and thickness for receiving the impression from the gelatine relief. To impress the gelatine relief upon the sheet or plate of lead prepared as above, we use a gelatine relief obtained in the man ner well known and in use, which we place between the lower or the upper sheet of steel, and the lead plate or sheet, and pass the thus packed sheets through the roller press, having the same sett as used in producing the lead plate, with the result that the addition of the gelatine relief causes an impression to be produced upon the lead plate, which serves as the type for printing from with gelatinous inks or the like. When it is desired to print with greasy or fatty inks, we use a grained surface which we obtain by placing a gauze or perforated sheet between a positive and the gelatine sheet to receive the print or relief. This causes the gelatine relief to have a grained surface, and such grained surface is transferred to the lead plate or sheet in going through the roller press. As another method of obtaining a grained surface, we grain or rough the type surface, obtained as above by placing upon the imprint or face of the lead type a graining or roughening medium, such as a sheet of fine wire guaze, muslin soaked in glue and dried, sand paper, or the like. Upon the back of the graining or roughening medium we place a layer of soft material such as cloth, and, together with the sheet and cardboard sheets as above described, we pass them through the roller press under a light pressure, but with the same sett as when impressing the gelatine relief, thus effecting a graining, roughening, or abrasion of the surface, so producing a surface suitable for using fatty or greasy printing ink to print with. We claim— 1st. The mode, substantially herein described, of producing printing surfaces for printing from, in processes in which are employed gelatinous ink, which mode consists in imparting to lead or soft metal plates a true and even surface by roller pressure, and impressing into such prepared lead or soft metal plate a gelatine relief by roller pressure in the manner set forth. 2nd. The mode, substantially herein described, of producing printing surfaces for printing from, in processes in which are employed greasy or fatty ink, which mode consists of imparting to lead or soft metal plates a true surface and thickness by roller or other pressure, and impressing into such prepared lead or soft metal plate a grained gelatine relief or a graining medium by the means set forth. 3rd. The use, in connection with the process herein described, of the steel or equivalent metal sheets, and the card-board or equivalent elastic sheets substantially as herein set forth. Patent Granted in America. 275,073. G. Frank E. Pearsall, of Brooklyn, N.Y., for “A folding photographic camera.”—Application filed 29th Sep tember, 1882. No model. “ HOW No. 1 WAS TAKEN.” BY HENRY DIXON. Not “No. 1” Fenian, nor number one as being the first animal photographed by T. J. Dixon ; not even because it is the best, but because, having “taken ” the public, it has found its way to the top of a long list of animal studies. Although no detective was employed, it was taken bv the aid of a finder. By-the-bye, I think policemen call “ finders ” mouchers, and in one of Dickens’s works, a Miss Moucher did good service that way, but she did not help take a lion, only a jackal. The finder used to take No. 1 was simply a duplicate lens—or rather, I should say, a lens of same focus, lor a similar lens I can’t find—to focus by, and so have the lens that does the woik ready with best possible plate in its place behind. Well, everything ready, and his majesty in front looking very glum, wait awhile; expression improves. “ Please keep whiskers still—head slightly more to the left—steady 1 ” No. His majesty looks as if he quite understands what you wish him to do, but be gives his head a slight toss with a turned-up-nose expression, and seems to say, “ You have not got me yet,” and takes a gentle walk to another part of his recreation ground. Try again, follow him up, get every thing ready to pull the shutter spring. He looks interested, and altogether first rate—now then ! No. His interest is in tbe lens, and just as you do pull the string, he rises and approaches so rapidly that you have just time to back the instrument out of reach of his mouth, and so save your lens from a ruinous scrunch. At last the chance comes. The string is pulled, and held with bated breath for such portion of a second as his majesty condescends to remain still. At tbe first imaginary sign of movement the string is released, and a spring stops the ex posure (in this case about 4 of a second). Then more plates and attempts at other animals, for his majesty is tired and restless, so no more is to be got from him. The lens with which No. 1 and all the other published Dixon Series of Animal Studies were taken was not by any modern celebrated manufacturer, but by Mr. Slater, one of the early makers, who lived behind a very large telescope in the Euston Road, near where the Midland Railway terminus is now. He made it for a C.D.V. lens at least twenty years ago, and it has been tested against baby lenses, carte lenses, and others by best makers, audit is better than any for the special purpose. The direct negative of No. 1 was small for C.D.V. The camera is arranged for two exposures on half-plate, and small figures are preferred for enlarging, because the perspective is not exaggerated. Of course out of many exposures there are only a very few so perfect as to bear enlarging to any extent, but when the small one is perfect, almost anything can be done. The “ Dixon” way of enlarging these studies is to make a collodion transparency in the camera, direct to the size required. If not quite pleased with it, do another and another till the best possible result is gained—the trans parency to look more brilliant than you wish the finished print to be. Then take a carbon print on special trans parency tissue, develop on glass, and there is your finished large negative. Should this come to grief, you can make as many more as you please while you preserve your transparency. Enlargements produced this way give prints with better and richer depths in the shadows, especially for carbon printing (all the 14 by 10 studies are printed in carbon), than if done any other way, because the carbon negative is in intaglio, and while the tissue in printing this is pressed closely to the high lights, so securing extreme sharpness, it gets less and less closely pressed as it covers the deep shadows, and so the light gets somewhat diffused there, and over-rides any roughness or woolliness in the enlargement of original film. The amount of enlargement capable of being produced by this method is astonishing. In one case, a small origi-
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