The photographic news

• Bandzählung: 7.1863
• Erscheinungsdatum: 1863
• Sprache: Englisch
• Signatur: F 135
• Vorlage: Hochschule für Grafik und Buchkunst Leipzig
• Digitalisat: Hochschule für Grafik und Buchkunst Leipzig
• Digitalisat: SLUB Dresden
• Rechtehinweis: Public Domain Mark 1.0
• URN: urn:nbn:de:bsz:14-db-id1780948042-186300004
• PURL: http://digital.slub-dresden.de/id1780948042-18630000
• OAI: oai:de:slub-dresden:db:id-1780948042-18630000
• Sammlungen: LDP: Historische Bestände der Hochschule für Grafik und Buchkunst Leipzig
• Sammlungen: Fotografie
• Strukturtyp: Band

• Digitalisat: SLUB Dresden
• Strukturtyp: Ausgabe

January 2, 1863.] THE PHOTOGRAPHIC NEWS. 9 whole revolves towards the operator. By this movement the plate places itself in the slide, and the liquid Hows into the reservoir. The slide is then closed, the bath removed, and the plate is now ready for exposure in the camera. When it is desired to shut the hath hermetically, the vulcanized cover is screwed on, as in ordinary vertical baths. “ Apparatus for Developinc/ liaths.—Upon leaving the camera, the picture, as is well known, exists only in the latent state. I have therefore been led to construct a bath made so as to receive the plate from the slide, after its exposure in the camera, without its being attackable by the external photogenic rays ; to develop and watch the appearance of the image in its different stages; and lastly, to wash it, and allow it to be withdrawn only after its com plete appearance. Upon removing the slide from the camera, it isadapted tothis bath by means of grooves, and thequantity of developing solution introduced requisite to cover the plate ; the covers are then opened, and the plate slides into the bath. As soon as it reaches the bottom, it is rocked, as generally done ; and upon opening the bottom of the bath, employing a reflector, and examining it by light admitted through a yellow glass, we follow the operation step by step. . When satisfied with the result, the liquid is rejected; the picture is then washed, withdrawn from the bath, and fixed.” M. de Changy presented to the Society his new arrange ment for positive printing frames. These frames differ essentially from the ordinary ones, inasmuch as the screws and springs usually employed to press the negative and printing paper together, are sup pressed. To replace these, the inventor has placed under each bar of the back of the frame four india-rubber springs, arranged perpendicularly to the bars, and which, by their elasticity, assure an equable, gentle pressure. In another system of frames, the bars, furnished with the same kind of india-rubber springs, are armed on their upper part with an excentric lever, which, upon being turned, permits of the gradual exercise of a strong pressure upon the glass. M. Stephen Geoffray communicated some observations upon the employment, as recommended by himself some years ago, of the iodide of carbon in the solutions of spirits of turpentine and of benzine, of which some photographers make use in the preparation of negative paper. This sub stance possesses great advantages, for it is soluble in these two vehicles, which the alkaline or metallic iodides are not. The President, while recognizing that the organic iodides might be advantageously employed in this case, feared that M. Geoffray was in error with regard to the nature of the compound sold to him under the name of iodide of carbon, for hitherto the iodides of carbon have only been prepared in the laboratory. M. Geoffray said, that the product in question was in the form of a yellow powder, slightly crystallized. From this description the President thought it must be iodoform. The President then reminded the Society, that on the 1st of May, 1863, the bi-annu Exhibition of the Fine Arts would be opened. Without being able at present to state what would be the conditions of this exhibition, the Com mittee of administration is already in a position to inform photographers that, according to the practice adopted in former years, the exhibition of the French Photographic Society would figure side by side with that of the Fine Arts. The President considered it his duty to invite the members of the Society to make their preparations at once, and unite all their efforts to represent the French Photographic Society worthily at this Exhibition, to which the best pro ductions of foreign artists will be admitted. THE PATENT ALBUMENIZED PAPER. SrR, I was somewhat surprised to see, from your last weeks " News,” that our talented friend Mr. Sutton is about to patent a process for the preparation of caoutchouc-albumen paper, when, from what 1 can learn as to his method of pre paration, the system has been in operation amongst many eminent photographers for four or five years at least, and 1 believe was invented by my old friend M. Gaume of Mans, who obtained a prize from M. Le Duc de Luynes, through the Socit Photographique de Franaise in 1857 or 1858, I remember not which year. M. Gaume prepared his paper in a solution of gutta-percha, or india-rubber and benzole, and sensitized it in a bath which contained alcohol. Again, M. Durer, of Paris, used india-rubber solution regularly, and 1 believe, uses it now. Herr Carl Sholts has used it for seve ral years, I am informed and M. Von Monkhoven, 1 believe, published a formula for the use of it three years ago. I have used a solution of gutta-percha since 1858, both in Paris, in New York, and in Bremen Haben, and now use it in England ; and should you think my formula worth the notice of your readers, I shall be happy to send you the details in the course of a few weeks, as 1 do not hold with those narrow-minded people who would patent for self-grati fication that which of propriety belongs to the whole photo- grahic profession. I admire Mr. Sutton, and give him all honour for his valuable works and suggestions; but I cannot help expressing my extreme surprise and regret that he should seek to monopolize to himself the honour to which M. Gaume is entitled, and the profits which ought to be the common property of the profession. With many apologies for the length of my letter, and the indifferent English in which, as a foreigner, I am compelled to express myself, I remain, yours most respectfully, AXGELO Bianchi. Art Studio, Zetten Hall, 22nd December, 1862. [The use of waterproof solutions for preparing photo graphic paper is not new; but, until the publication of Mr. Sutton’s specification, we cannot state the precise amount of novelty it may embrace. We remember repeated occasions on which such preparations have been proposed; but there are none, so far as we know, which are precisely the same as that of Mr. Sutton. M. Gaume, for instance, used gutta percha prior to albumenizing ; others have used gutta-percha, india-rubber, &c., without albumenizing. Regarding the right to patent such things, it is a wide and difficult ques tion. Whilst we desire to see the utmost liberality in every thing connected with the art, and are convinced that much of its progress is due to the prevalence of this liberality, we cannot overlook the fact that there are occasions when it is due to the experimentalist that he derive some substantial profit from his labours. Few men have contributed more valuable suggestions, appliances, and improvements in the art of photograpy than Mr. Sutton—few with so much libe rality. And of this we are assured, that he would not will ingly appropriate either the credit or the profit due to others. If it should turn out that the idea has been so far forestalled as to make the patent of doubtful validity, we believe Mr. Sutton would be the first to propose that his process should be given freely to the public. We shall be glad to receive practical details, and the results of any analogous process, and give them the utmost publicity.— Ev.] PAPER PREPARED WITH GUTTA PERCHA. Dear Sir,—Being a constant reader of your valuable publication, I have received great advantages from your re marks and suggestions. I have practised the art, as ama teur, for the last ten years, and I found that the great desi deratum is good paper, without that high gloss which is obtained [on albumenized paper. In that direction I have for some time made experiments, which seemed to me satis factory ; but I still postpone to make it public until I shall have obtained the opinion of others. I have shown some prints to photographers in the neighbourhood, yet I in tended to wait till fine weather. Reading your last number, I was taken by surprise to see that Mr. Sutton has taken a patent for albumenized paper, by rendering the paper water proof. This is just the process that I pursued. He does it