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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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- Bandzählung
- No. 1317, November 30, 1883
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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
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Band
Band 27.1883
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- Titel
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November 30, 1883. J THE PHOTOGRAPHIC NEWS. pendicular position above the bottom of the vessel, when the water impregnated with the salts naturally sinks, and is then drawn off. Arrange a cask, A, and a tub, B, as in drawing, regu lating the run of the water from the two taps, C and D, so that as much water will run off at D as enters the tub B at C. The tub, B, must be full of water, and the prints, having been toned, fixed, and washed in one or two changes of water so as to get rid of the superfluous traces of the soda, they are suspended by one corner to clean corks by means of pins ; two pictures to one cork, as a rule, will be best—viz., one on either side of the flat ends. Common sense will suggest to the operator to attach the pictures so that the surplus portion of the paper of the print will be near the cork, and to do the trimming after the washing and drying. No more care is necessary but an occasional look to see that the water in C has not all run out. Prints treated in this way will be found to be washed perfectly. Having plenty of water at command, I allow the stream to run from the afternoon of the day 1 tone, till about ten or twelve o’clock the following day ; but if a great quantity of water is not at command, let the taps C and D run slowly, and do not disturb the water in B when taking the pic- tares out. FRENCH CORRESPONDENCE. The Blind for Gelatine Plate Work—POrTEvI's Monu ment Committee—M. Scola’s Lamp Flame and Eosine Plates — Possession of Negative — Photographic Reproduction at the Musee des Arts DECORATIFS— Thiebaut’s Pellicle Paper. Employment of the Blind for Gelatine Plate Work.—M. Maret has proposed the idea of employing blind workmen in most of the operations relating to gelatine plates. It is found that the eyesight of those working in dark-rooms, or only lighted with a red lamp, suffers greatly, and there fore blind people might be able to do the work without discomfort, with the exception of coating the plates with the sensitive film. With this idea in view, M. Davanne has communicated with the director of the institution for the blind, M. Martin, and we have every reason to believe that this arrangement will meet With good results. Poitevin Committee.—The Poitevin subscription committee has begun work. The plan submitted by the architect appointed has been approved of, and the date of inaugura tion of the monument is already fixed for the first Sunday in September next, at the town of St. Calais. Experiment u-itli M. Seola's Lamp Flame and Eosine Plates. —I have verified the fact suggested before of the decided action taking place on eosine plates by the perchlorate of sodium and spirit lamp flame. Two plates being simul taneously exposed in the same dark slide, one eosine and the other one Monckhoven’s, each bearing Warnerke’s photometric scale. The exposure was two minutes at the distance of 40 centimetres from the flame, having a yellow glass before it, therefore emitting only yellow light. After immediate and simultaneous development, the Monckhoven plate showed scarcely any result, only the slightest tint on the outer circumference of the photometer. The eosine plate, on the other hand, gave signs of direct action ; the outer edge of the photometer was black, while the rays had even penetrated to the most opaque portion. This fact is, therefore, manifest: ordinary emulsions are not acted upon by a monochromatic yellow light, while eosine plates are greatly influenced by it. A similar ex periment was carried on by a perchlorate of strontium and alcohol flame with a ruby glass interposed, and the results were almost exactly the same, except that the eosine plate was acted upon more slightly. Case of Possession of Negatives.—The Chambre Syndicale has just passed sentence in a case showing that photo graphers must be careful, in the wording of their invoiced, not to confuse the actual negative with the first copy de livered to their clients. The photographer in question sent the following invoice : — One negative (cliche negatif) ... 60 francs Six copies 80 ,, The Chambre Syndicale decided that the negative was due to the client. It must therefore be remembered that the price of the first copy must be demanded when the photo grapher wishes to keep the negative. Photographic Department of the Musee des Arts Decoratifs.— The administration of this museum is studying the desira bility of establishing a studio for photographic reproduc tion, to be situated close to it. It will be used for photo graphing not only the objects in the museum itself, but also those works exhibited at the Union Centrale des Arts Decoratifs and from private collections, where permission can be obtained for copying and publishing. As soon as this is carried into effect, copies of most of our works of art will be made popular by selling at a low price. Thiebaut’s Pellicle Paper.—The reversible pellicle is ad mirably adapted for use with automatic cameras in endless bands. I have used it successfully in Stebbing’s cmera. In developing, the bands are cut in pieces, comprising two or three pictures, and are put to soak in cold water in the dark-room. They are next immersed in a ferrous oxalate bath in the bottom of which is a glass plate rather larger than the dimensions of the three negatives. As soon as the development is finished, take the strip out, still keep ing on the plate, and wash; take it up by one corner, and it can be easily detached from the paper. Float it again on to the glass, and submit it to the hypo-bath; afterwards wash well, and finish by dipping in a five per cent, chrome alum solution; rinse again, dry between blotting-paper, and fix on a clean glass by gumming strips of paper round the edges. By this method, negatives of 6 by 6 centimetres reach the dimensions of 7 by 7 after these operations, and no difficulty presents itself. If it be found difficult to manipulate with the tiny floating pellicles, do not take more than two at a time. I cannot speak too highly of the value of this paper for small picture, its lightness con tributing greatly to its portability. Leon VID4L. Eotes. An artists’ photo-club is spoken of, to be composed of painters, sculptors, and draughtsmen, who practise photo graphy. Dr. J. M. Eder has published the sixth part of his great work on photography; the volume treats especially of Daguerreotype, ‘Talbotype, Nipotype, and the introduc tion of negative processes.
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