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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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- SLUB Dresden
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- http://digital.slub-dresden.de/id1780948042-18830000
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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 27.1883
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soft, as success depends in a great measure on their pliabdity [ at this stage. The time that elapses while the mounted । prints are drying may be occupied in preparing the plates. Patent plate free from imperfections should be cleaned | with dilute nitric acid, well washed, and polished with tripoli, or any of the substances usually employed for plate cleaning; powdered French chalk (talc) is dusted on the sur face, and removed with the polishing cloth. Pass a camel- hair brush over the plates to remove any particles of dust, then coat them with normal collodion in the same manner as coating a wet plate or varnishing a negative ; when set, rear on end to dry. A. number of plates may be coated, as they will be none the worse for keeping. We will sup pose the mounted photographs have been soaked as directed, and are soft; remove them from the dish of water to a clean damp cloth ; blot off the excess of water, and leave them in the cloth until they are required for the next operation. The gelatine should be re-melted in a flat porcelain dish over a water bath ; into the solution immerse one of the dry collodion plates, and one of the photographs from the damp cloth. To bring these two into perfect contact requires a little skill and practice. From our description, however, it should not be found at all difficult. With the left hand hold the plate, collodion side uppermost, just under the surface of the solution; with the right hand lower the print gradually on to the plate, commencing at the bottom and working upwards. The top of the print should be held outwards, so as to form a slight curve ; by this means it will be easy to see the air-bells gradually pushed out as the two surfaces come in contact. Having accomplished this satisfactorily, lay the plate down on the bench, and well squeegee the back of the photograph to remove any excess of gelatine and air imprisonedin the paper. When all the prints have been squeegeed down on their respective plates, place them in a current of dry air, and leave them for twelve hours ; at the end of that period the prints will probably have dropped off the plates; if not, they will come away quite easily if the point of a penknife is passed round the outer edges to give them a start. It is not usual for photographers to deliver these so-called enamelled photographs to their clients in this condition; they are generally stamped up by an embossing press. The margin, after being reduced to the required size (prints intended for enamelling need not be cut until after they leave the glass plate), is fastened with glue to an ordinary thick card mount. When cabinet or larger sizes are produced, the air space between the em bossing and the ordinary mount should be filled with cotton wool padding, to prevent the centre falling in by reason of changes in the atmosphere. It will be seen that the highest degree of finish can be obtained by this method. Pictures printed as cameo vignettes, medallions, and cushion-shapes with priuted-in margin, as described in a former lesson, are particularly suited to this class of work. Fig. 3 is a sketch of an embossing press. The print is adjusted so that when the pressure is exerted the Fig. 3. metal die fits exactly over the mask line selected in printing ; that is to say, an oval used in printing should be of the same dimensions as the die of the embossing press. Do not apply too much pressure, and immediately remove the print, for unless the cardboard be of unusually good quality, it will in all probability burst. Many in experienced persons fall into error in this particular, and throw the blame on the pressor the cardboard. To avoid such failures, allow the print to remain under less pres sure for a longer period, say one or two minutes. Before quitting the subject of enamelling, it will be well to give directions for removing the white and other spots caused by dust in printing and imperfections in the nega tive. Water colours may be used for the purpose, pro vided the medium cannot be easily removed by water. Such a substance we have in spike oil of lavender. For white spots, mix India ink, Indian rod, and neutral tint with spike oil of lavender to the consistency of cream; test it for shade of colour by touching out a white spot. Use a sable brush with good point. Let the brush be charged freely with colour, and then worked nearly dry on the palette ; by adopting this measure, the beginner will soon be able to touch prints successfully, an achievement he would not attain if the brush were loaded with colour. In the latter case, he would take out a white spot, and put in a black one—a circumstance sometimes met with among professional spotters. If the colour is the same shade as the photograph, then proceed to remove all the white spots, levelling them carefully into the surrounding parts. Dark spots may be lightened with Chinese or zinc white and Indian red mixed with spike oil as before. All the working up that is intended to be put on the print should be done after mounting, and before soaking in the vessel of cold water Another vehicle is sometimes used for mixing the colours, viz., gelatine containing a small pro portion of chrome alum to render it insoluble. There are other methods of obtaining enamelled surfaces, differing from the foregoing, inasmuch as the vehicle gelatine is dispensed with in one, and both gelatine and collodion in another. In the former case, the glass plate is coated with wax in one of its solvents (either benzoline spirit, or methylated ether will do), over this the plate receives a film of plain collodion in which the solvents are about equally proportioned. Thus:— Pyroxyline (Hopkinand Williams) ounce Methylated alcohol ... .. 10 ounces ,, ether 10 » Castor oil 20 drops Moisten the cotton with 2 ounces of alcohol, then add the ether. Finally add the remaining 8 ounces of alcohol in which the castor oil has been previously dissolved. When set, it should be washed in cold water until, when water is poured on, streaks and greasy lines have dis appeared. Unmounted prints previously soaked in water are to be
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