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The photographic news
- Bandzählung
- 27.1883
- Erscheinungsdatum
- 1883
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- Englisch
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- F 135
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- Hochschule für Grafik und Buchkunst Leipzig
- Digitalisat
- Hochschule für Grafik und Buchkunst Leipzig
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- http://digital.slub-dresden.de/id1780948042-18830000
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- Parlamentsperiode
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- Bandzählung
- No. 1314, November 9, 1883
- Digitalisat
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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
- The photographic news
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of resisting the decolorising action of light. But there is no pigment in an argentic print, nothing but the silver reduced by the developer after the action of light; and that has been shown by, I think, Captain Abney, to be of a very stable and not easily decomposed nature ; while if the pictures are passed through a solution of alum after washing and fixing, the gelatine also is so acted upon as to be rendered in a great degree impervious to the action of damp, and the pictures are then somewhat similar to carbon pictures without carbon. I may now say a few words on the defects and failures some times met with in working this process ; and first in regard to the yellowing of the whites. I hear frequent complaints of this want of purity in the whites, especially in vignetted enlargements, and I believe that this almost always arises from one or other of the two following causes. 1st. An excess of the ferrous salt in the ferrous oxalate deve loper ; and when this is the case, the yellow compound salt is more in suspension than solution, and in the course of develop ment it is deposited upon, and at the same time formed in, the gelatinous film. The proportions of saturated solution of oxalate to saturated solution of iron, to form the oxalate of iron developer, that has been recommended by the highest and almost only scientific authority on the subject—Dr. Eder—are from 4 to 6 parts of potassic oxalate to 1 part of ferrous sulphate. Now while these proportions may be the best for the deve lopment of a negative, they are not, according to my experience, the best for gelatine bromide positive enlargements ; I find, indeed, that potassic oxalate should not have more than one-eighth of the ferrous sulphate solution added to it, otherwise it will not hold in proper solution for any length of time the compound salt formed when the two are mixed. The other cause is the fixing bath. This, for opals and vig netted enlargements especially, should always be fresh and pretty strong, so that the picture will clear rapidly before any deposit has time to take place, as it will be observed that very shortly after even one iron developed print has been fixed in it a deposit of some kind begins to take place, so that although it may be used a number of times for fixing prints that are meant to be coloured afterwards, it is best to take a small quantity of fresh hypo for every enlargement meant to be finished in black and white. The proportions I use are 8 ounces to the pint of water. Almost the only other complaints I now hear are trace able to over-exposure, or lack of intelligent cleanliness in the handling of the paper. The operator, after having been dabbling for some time in hypo, or pyro, or silver solution, gives his hands a wipe on the focussing cloth, and straightway sets about making an enlargement, ending up by blessing the manufacturer who sent him paper full of black stains and smears. Argentic paper is capable of yielding excellent enlargements, but it must be intelligently exposed, intelligently developed, and cleanly and carefully handled. Motes. We publish to-day our final notice of the Exhibition; it closes definitely on Thursday. Norway has a Photographic Society with its head-quarters in Christiania. Dr. Hermann Vogel arrived back in Berlin last week with his American honours fresh upon him ; Dr. Vogel promises us some notes on American portraiture for the coming YEAR-BooK. We beg all those who have the good intention of sending us a brief article for our annual, to forward the same with out delay. Captain Abney, R.E., F.R.S., is nominated on the Council of the Royal Society for the ensuing year, as is also Mr. J. W. L. Glaisher, the son of the president of the Photographic Society. The study by Mr. J. Bullock, of Leamington, which forms our pictorial supplement this week, was the only portrait that secured a medal at Pall Mall. What on earth has happened to the Tiniest Our lead ing luminary not only published on Saturday a very sensible article on “ Recent Photographic Apparatus,” but gave therein the best summary of photographic technics we have seen for many a day. We hear that the Bristol Exhibition is likely to contain a goodly collection of foreign pictures this year; intending exhibitors at this triennial gathering in the West of England should note that the time for sending in is the 1st December; but that they must make application for space by Thursday next, the 15th inst. We are happy to say that Mr. H. P. Robinson -will shortly commence in our columns a series of articles touching pictorial photography. We are glad to welcome the veteran Arctic photo grapher, Mr. W. J. A. Grant, home again. He has been once more to the Polar Seas with his old love the Willem Barents, and sends us a letter, which will be found in another column, about dry plates and the Custom House. Photography readily combines with other professions- a fact on which we commented recently. Here is a case in point. Mr. Benedict Zibach, whose premises are re quired by the Metropolitan Railway, is, besides being a photographer, also a barber, a manufacturer of mineral waters, and an “ exhibitor of living curiosities ; ” in other words, a showman. As Mr. Zibach wanted more for his premises than the Railway Company chose to give, he had to produce evidence of his takings before a jury. From this it appears that while the exhibition of fat ladies, marionettes, and other " curiosities ” brought him in an income of £451, photography yielded but £167, while the mineral water manufactory was worth £215 per annum. It is, however, a consolation to learn that photography occupied a higher position than hair-dressing, which was valued at £85 only. It may be of interest to know that the estimated profit out of the photographs was ninepence in the shilling. Seventy-five per cent, profit is not bad. “ They are nearly all gone already ; these pictures always make them sell.” So said the keeper of the book stall at Waterloo, as he handed us the Pictorial World on Friday last. He referred to Mr. Dixon’s zoological studies, the reprodnetion to which he pointed being a Leopard couchant, a companion picture to the lion which formed our supplement on the 27th of April last. The two reproductions differ, however, in one very im portant respect, although both are printed from litho-
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