The photographic news

• Bandzählung: 29.1885
• Erscheinungsdatum: 1885
• 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-id1780948042-188500006
• PURL: http://digital.slub-dresden.de/id1780948042-18850000
• OAI: oai:de:slub-dresden:db:id-1780948042-18850000
• Sammlungen: LDP: Historische Bestände der Hochschule für Grafik und Buchkunst Leipzig
• Sammlungen: Fotografie
• Bemerkung: Seite I-II fehlen in der Vorlage. Paginierfehler: Seite 160 als Seite 144 gezählt.
• Strukturtyp: Band

• Digitalisat: SLUB Dresden
• Strukturtyp: Ausgabe

APEIL 17, 1885 J THE PHOTOGRAPHIC NEWS. 247 Filter, and mix in equal parts, adding No. 2 to No. 1. 250 grammes 15 ,, 1,600 „ 40 „ 1,600 „ 15 ,, 150 grammes 1,000 160 grammes 8 2.500 „ 1 gramme 125 grammes No. 3.—Alum Water Fixing. No. 6.—Hyposulphite of soda Water Developer. No. 1.—Neutral oxalate of potash Bromide of ammonium Hot water ... No. 2.—Sulphate of iron Hot water Citric acid If after reproducing the tracing in the camera, it is desired to bring back the photograph after previously wetting, dip it in a bath of neutral oxalate of potash in saturated aqueous solution of sulphite of iron. About one part of iron to five or six of the potash will be required, the image reappears immediately, and after washing, it is finished. It may also be made to disappear in a saturated solution of bichloride of mercury in 20 c.c. of No. 4.—Acetate of soda Chloride of lime Water No. 5. —Chloride of gold Water hydrochloric acid to 300 or 400 c.c. of water. In this case an eight per cent, solution of hyposulphite of soda will bring the image back. If it is desired to completely destroy it, one has only to use a three per cent, aqueous solution of cyanide of potassium ; to one-twentieth of the bulk add enough iodine to colour it, and mix the whole together. The process by bichloride of mercury has been used in making the prints by which the image is made to appear by dipping in water as in the so-called “magic photography” when it is pressed between blotting-paper impregnated with hypo. I think in certain cases, to see the work better, it would be preferable to use ferro- prussiate prints, as on the blue image the black tracing would be more easily seen. MM. Boussod, Valadon, and Co.’s Phololgpes.—This firm is now practising on a large scale the preparation of photo type blocks. The coming Salon number of L'Illustration will be printed entirely from phototype negatives by the Manzi process. The same publishers have just issued a splendid album from Detaille’s military drawings. Our friend Mr. Woodbury, to whom I showed these results, declared that as yet nothing had been produced in England to come up to them. I am directing my attention at pre sent in the application of new methods of photo typography to ceramics, and my first trials have met with perfect success. Gelatine Plate Machine.—My colleague, M. Stebbing, has just organised a gelatine plate making machine of the kind specified on page 199 of this year’s PHOTOGRAPIIC News. It works capitilly, and with such speed, that 600 plates of medium size can be easily prepared in an hour with perfect regularity ; and with these plates I have obtained the finest results. The emulsion is free from all defects, and the apparatus works so regularly that the film is quite uniformly spread. Leon Vidal. latter case the prints are not brilliant. The same deve loping bath, composed as follows, is sufficient for a good number of prints. These formulae are given by Mr. Morgan himself:— Daylight may be used as well as any artificial light. About five centimetres of magnesium ribbon are sufficieut to print from a normal negative. After exposure, the print ought to appear fainter rather than too deep in tone ; in toning it comes out in very agreeable warm colouring. To pre- serve a brilliant surface, it is recommended, after the final washing, to press it against a plate coated with talc, and rub with blotting-paper to squeeze out the excess of mois ture. When dry, a finely-glazed image is obtained with out the application of anything else, as in the so-called enamelled prints. Thanks to Mr. Morgan, we are able to print quickly and with excellent results, with this gelatino- chloride paper, while, under ordinary circumstances, in this dull weather, we should have to spend a whole day to get a single print from the same negative. The one little remaining question is that of the cost of this paper ; but no doubt, when in general use, it will be reduced to that of chloride of silver albumenised paper. Photo-Tracing Process.-—I have already stated that the process known as photocabpic consists in directly tracing by hand with a pen over photographic prints without inter posing tracing paper. However transparent the tracing paper, it always hides certain details in the shadows, and it is troublesome work in that case. This process is very useful at times, as the photograph cau be entirely effaced, leaving only the tracing in absolutely black lines, which may be made thicker in the shadows, and a reduced nega tive taken from the tracing can be employed for typo graphic or other purposes. By this means one has not to contend with the inability of a draughtsman, as he has only to be supplied with a silver print on salted paper, fixed in hypo, but not toned. If it is the case of an autographic transfer, the print is sized on the under surface with a solu tion of tapioca in hot water, aud the tracing is done in lithographic ink. No reducing is permissible in such a case; the transfer is direct, and of the same size as the original. If it is required to be reduced, the tracing is made in Indian ink. To cause the image to disappear the print has only to be immersed in a solution of— Bichloride of copper ... ... 15 grammes Water 100 „ Patent Granted in America. 314,811. Benjamin J. Edwards, London, County of Middlesex, England. “ Apparatus for coating photographic plates.”— Filed October 22nd, 1884. (No model) Patented in Eng land June 5, 1884, No. 8643. This apparatus is described and figured on page 541 of our volume for 1884. Qatent ntelligence. Applications for Letters Patent. 4234. William MIDDLENIISS, Holmefield Mill, Thornton Road, Bradford, Yorkshire, for “ Improvements in photographic cameras.”—7th April, 1885. 4288. Scotto Clark Nash, 33, Chancery Lane, London, for “ Improvements in portable photographic cameras.”— 7th April, 1885. 4378. Edward Marlow and Henry Bishop, 4 and 5, Arcade Chambers, Corporation Street, Birmingham, for “ Improve ments in the construction of dark-room lamps or lanterns for photographers’ use.”—9th April, 1885. 4528. William Ford Stanley, 4 and 5, Great Turnstile, Hol- born, Middlesex, for “Improvements in photographic cameras.”—(Complete specification)—13th April, 1885. 4529. William Ford Stanley, 4 and 5, Great Turnstile, Hol- born, Middlesex, for “ Actinometer for photography.”— 13th April, 1885. 4531. William Low SARJEANT, 19, Enmore Park, South Nor wood, Surrey, for “Spring shutter for camera.”—13th April, 1885. Patents Void through Non-payment of Duty 10. A. M. Clark (Corbassierc).—Photographic panting. 27. A. M. Khotinsky.—Lime light lamps. Specification Published during the Week. 7201. Thomas Samuels, of Monken Hadley, in the County of Middlesex, Gentleman, for “An improvement in photographic cameras.”—Dated 3rd May, 188 4. The patentee appears to claim the use of a double swing- front. ... ... 125 grammes 2500 „ Toning Bath.