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The photographic news
- Bandzählung
- 24.1880
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- 1880
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- Bandzählung
- No. 1160, November 26, 1880
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Zeitschrift
The photographic news
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Band 24.1880
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- Register Index 631
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Band
Band 24.1880
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566 THE PHOTOGRAPHIC NEWS. [NOvENBER 26, 1880. acquainted with Woodburytype for the first time, and how lucky Mr. Woodbury was to have conceived it; few consider the matter seriously, and dream that there has been tedious experimenting and elaborate labours preceding the work. Mr. Woodbury appears to have never been without a camera since he was old enough to carry one. Articled to a civil engineer, he had barely served his time, than he went off to Australia, when thirty years ago the popular tide set in that direction. Like Moses with the green spectacles, he forthwith purchased a camera with his avail able cash—about the most useless thing he could possibly buy, without chemicals and other necessaries for the taking of photographs. However, the latter were afterwards acquired, when Mr. Woodbury had suffered some of those vicissitudes which the bard tells us “ acquaint a man with strange bed fellows.” Indeed, so successful was he with his camera, when once firmly on his feet, that in 1854 the prise medal was awarded to him for photography in the Australian Colonies. Quitting Australia, we find Mr. Woodbury in 1857 and 1858 in Java, taking pictures for the Sultan, and to prove how well these were executed we have but to refer the reader to the charming transparencies of scenery in the Tropics, pub lished in 1859 byNegrettiand Zambra. We were looking at a series the other day of these glass stereoscopic slides, the photographs printed upon albumen, and we fearlessly assert that nothing of the kind which has been produced in recent years excels the delightful pictures of luxuriant foliage and eastern vegetation which Mr. Woodbury pro duced nearly a quarter of a century ago. What is this curious little picture Mr. Woodbury brings to us? It is in a tiny frame, and represents a table decked with fruit and flowers, coloured vases, and gilded ornaments. It is a photograph, and yet it is resplendent in colours. Mr. Woodbury laughingly strips off the backing, and then we find it is a Woodbury transparency on glass, with a roughly-coloured ground beneath. It was made in 1868, and represents one of the earliest examples of this kind of work—a photographic image over a coloured groundwork— which, from that day to this, has been brought before the public under one name and the other. The French patented process, of which we have heard so much lately, about photographies des couleurs impressionees par la lumiere, is, of course, simply one example the more of this old dodge. But we must come to the present day. Mr. Woodbury hasplentyto show us, and here at Manor House hehaslabora- tory and workshops full of interesting matters. This oblong little box standing on end, about fourteen inches high, and six inches broad, is Mr. Woodbury’s balloon apparatus. It is not difficult to explain. It is carried into the air by a small balloon, which is tethered to the ground by an elec tric wire. It hangs down from the balloon exactly in the position in which we see it standing upright on the table. The lens is uncapped at will by a revolving disc, which re volves once every time the operator sends an electric current from below. He sees when the balloon has done gyrating, and between the turns makes his exposure. He can make four exposures at every ascent of the balloon, for he has four plates. These four plates are fixed to four faces of a cube, and this cube also makes one quarter turn (bringing another face, or plate, into position) whenever the operator sends an electric current up to the balloon from the earth. The system has the double advantage that only a small balloon is necessary, and that no risk is incurred by an aeronaut ; for according to recent experience, there seems to be no difficulty about bringing down a war balloon if you can get a cannon within two thousand yards of it. “ What a capital workshop you have here! ” we say; it is divided into four compartments for workmen, a broad passage running along at right angles to the divisions. “ It is a very useful one,” says our host, and then he adds, briefly, “I made it out of a four-stalled stable.” And so he had; verily Mr. Woodbury is an inventor to some purpose. Mr. Woodbury took out his patent for Woodburytype in 1864, but he no longer practises it in its original form ; the process is now reduced to a very simple matter, Mr. Wood bury proceeds to show us. As our readers know very well, this modified process has already appeared in these columns, and what we are about to describe is therefore nothing new. Indeed, we have no doubt that anybody interested in the subject would be quite as welcome to witness the simplified process as we were. Seeing is believing, however, and it was for this reason that we begged Mr. Woodbury to receive us. Imprimis, Mr. Woodbury takes a piece of carbon tissue and prints a picture upon it. This picture he develops upon a] piece of glass—patent plate glass. He has now, therefore, to all intentsand purposes a carbon transparency, which every carbon printer knows how to pioduce. This carbon transparency, still on glass, is, when dry, rubbed over with a little pomatum, and then a sheet of tin-foil put upon it. The two are now run through a small rolling press, such as every photographer possesses, with the result, of course, that the tin-foil is pressed into the carbon print. The carbon print, with its facing of tin-foil, is next care fully put into an electrotyping bath, where it is left for some hours. Copper deposits itself all over the tin-foil, and when the plate is raised from the bath, instead of presenting a shining silver surface, it is covered with beautiful red copper. Now for the next step. A thick slab of glass covered with resin is put upon an oven or water-bath to warm. The resin melts so that the top surface is adhesive. Under these circumstances, we take the electrotyped plate and press the copper surface firmly upon the resined glass. The whole is now cooled, and there remains attached to the glass block the copper and the tin-foil ; the carbon trans parency comes away. You see the sheet of tin-foil now, and find it has taken a cast of the carbon transparency, and this cast or mould, backed up by the copper and the resined plate, represents the printing block. From this printing block prints may then be taken in transparent ink, in ths ordinary well-known manner. The carbon transparency which comes away so easily, thanks to its treatmant with a little pomatum, may be used again and again for the preparation of printing-blocks, so that a dozen may be made, if necessary, without difficulty. No special apparatus whatever is necessary except the actual printing-press (which is a very simple matter), and a battery. Provided with these, any photographer might begin Woodbury printing to morrow. An ingenious little apparatus which Mr. Woodbury has to aid him in his work deserves description. It is a verit able multum in parvo. It is a small iron casting, measuring about twelve inches, and its framework repre sents a levelling stand. Place over it an iron plate, and below a spirit lamp, and it yields a hot plate for coating the glass block with resin. Put upon the iron plate a little oblong vessel filled with water, and there is at hand a water bath, useful for melting the resin (a lower temperature being now necessary), to effect the adhesion of the electro plate ; again, this little water-bath may be removed, and a deep upright vessel substituted, also to contain warm water, but with a grooved interior, employed for the deve lopment of the carbon prints. Paris, it seems, has been taking up the modified Woodbury process very warmly; so little apparatus is required, and the manipulations have been so much simplified, that the photographer has it in his own hands now to multiply impressions, and print them by photo engraving. Hutinet and Lamy, of Paris, are occupying themselves with the manufacture of the carbon tissue, &c., and photographers of high rank—like Nadar, and others— are seriously setting to work to print in Woodburytype instead of silver. About the preparation of the printing ink, in respect to which a good deal of mystery has been made, wo may men tion that it is but gelatine and water with any colour added,
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