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The photographic news
- Bandzählung
- 7.1863
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- 1863
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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. 237, March 20, 1863
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Zeitschrift
The photographic news
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Band 7.1863
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- Register Index 619
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Band 7.1863
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144 THE PHOTO GRAPHIC NEWS. [March 20, 1863. Ualk in the Studio. Mr. Meagher’s Camera.—The handsome large trunk camera sent by Mr. Meagher to the exhibition of the Photo graphic Society to be sold on behalf of the Lancashire Fund not having there met with a purchaser, it is now proposed to dispose of it by subscription sale. Ono hundred shares at five shillings each make the price of the camera; each subscrip tion of that amount entitling the subscriber to one chance in the drawing. Applications for shares should be made to Dr. Diamond, Secretary to the Photographic Society, Twickenham House, Twickenham. The camera is a very perfect one, and well worth the money for a chance. The Best Side of the Face for Portraiture.—A Cor respondent says: There is a point in portraiture that I have never seen hinted at in any photographic publication: it is, that everybody has two sides to his face. I might state it less equivocally, however, by saying that the sides of the face are not symmetrical, and you may notice that almost everyone has a better look on one side than on the other. This difference between the sides of the face is much more remarkable in some persons than in others, but in all it may be seen in a certain degree. The nose is always more or less turned to either side, commonly the left, and will consequently alter the expression by rendering one side of the face wider than the .other. This point is of considerable importance to portraitists, as they should always take the best side of their sitters. UD Oorxespondents. Coloured Glass.—« A. E. II.” sends a sample of glass] which is perfectly satisfactory and non-actinic. The samples sent by “A. Man in the Country ” are rather of a light brown tint than orange, and are quite un- suited for the dark-room. A.—Streaks on the plate in the direction of the dip will arise from several causes ; but those to which you refer, as appearing generally when fresh silver solution has been added to fill up the bath, probably arise from some floating matter at the surface of the solution, which has accumulated from the sides of the bath ; in such case cleaning the surface will frequently re move the streaks. Giving the plate a lateral motion in the bath will often prevent the formation of streaks. The addition of a little nitric acid is often a remedy. Sometimes after taking a few plates it will disappear without further steps. De Langue.—We do not know whether any one in this country is agent for M. Bertch's camera. 2. From the results we have seen produced it appears good, but we do not know anything of it beyond this. \V. B.—We have no means of accounting certainly for the stain on your print; it appears to have resulted from the action of an acid. 2. It is well to wash thoroughly before toning ; two changes of distilled water, if pro perly manipulated, might be made to remove the greater part of the free nitrate. I). Ferguson.—The process referred to is worked by the American Photo type Company, and, we presume, they are the patentees of the process. Amaranth.—The intrinsic value of a 12 by 10 photograph, apart from its value as a picture, may easily be estimated by ascertaining the trade price for printing such photographs, which is about 18s. per dozen. 2. The selling price of photographs of that size varies from 5s. to 10s. and upwards, according to the excellence of the picture and the interest or rarity of the subject. 3. We cannot recommend you a publisher. 4. If you merely wish to make photography pay its own expenses, and have some good negatives, the Amateur Photographic Association will afford you the best facilities for disposing of prints. 5. Reproductions are rarely so valuable as photo graphs from nature, unless the originals are rare and valuable. 6. There is no reason why a good negative should not be taken on flatted crown. For large plates it is apt to break, and its surface is not quite so good as patent plate. 7. Flatted crown is generally slightly curved, and is not polished like patent plate. The latter is by no means always of one uni form thickness, nor is it always quite free from blemishes; but if of good quality it is tolerably free. The price depends upon the size of the plates ; 12 by 10 plates are about 2s. a foot; 8} by 62 plates are about 7s. a dozen ; but prices vary. Amateur in St. Thomas, W. J.—An ordinary copying camera and suitable lens, say the triple, will answer every purpose for copying oil paintings. We are not aware that any camera has been made for that work only. 2. Unless instructions to the contrary are given we apprehend that the rose tinted albumenized paper should be treated in all respects as that without a tint. See first article in the present number. We are obliged by your kind offer of services in the West Indies. S. G.—Various substitutes for yellow glass have been tried with more or less of efficiency. Your proposition to use coloured gelatine may probably answer. It is easy to colour it, but it is doubtful whether the colour will be quite non-actinic or permanent. A solution of annatto or saffron will give you a good deep yellow ; but these will be apt to fade in sunlight. The addition of a grain of nitrate of silver to each ounce of gelatine solu tion will, when exposed to light, probably give you a permanent non- actinic colour. Judson’s orange dye will probably answer. Coating the plate with plain gelatine, and when nearly dry immersing it in a solution of the colouring matter will probably be a good mode of applying it. TEOS.—The camera to which you refer being a modern invention is less likely to be obtained second hand than one of older form. We are not very familiar, however, with the class of photographic materials to be obtained second hand ; but there are, no doubt, sometimes bargains to be had. The price you quote for the camera, referred to is, if we remember rightly, for a complete equipment of double backs, leather case, tripod, kc. If you require the camera alone the price would probably be less. Photographic Enthusiast.—A Stanhope lens is a cylindrical piece of glass with both ends convex, of such curves as will make the foci of parallel rays refracted at one surface coincide with the other, so that objects placed in contact with one surface are seen greatly magnified on looking through the other. 2. The Coddington lens is a small spherical lens, with the equatorial portions ground away so as to correct spherical aberrations. Neither of these are suitable for photographic purposes. 3. A moveable partition in a belows stereoscopic camera need only come in contact with the edges of the folds, it is not necessary to fit into the gussets. It may be of any convenient material. 4. Some operators use a leather for polishing glasses, just in the condition it is sold ; but it is safer to wash it thoroughly in spirits of wine and water. 5. A bromo-iodized collodion will bear a stronger iron developer than a simply iodized sample. 6. In the panoramic pictures exhibited at the London Society, the lens had no part in producing the panoramic results. It was simply a common achromatic stereoscopic lens, and the picture might have been better had the lens defined better. The panoramic result was due to a mechanical contrivance for moving plate and camera in proper ratio during exposure. The specification will be shortly published. 7. It is probable that it would cost you more to make'a bad lens than to purchase a good one; even with the best written instructions to guide you. Purchase a good lens if you can; but, at the same time, do not be discouraged if you can only afford a cheap one. By great care and skill good results have been produced by a common single lens. M. B. L.—By mixing a portion of a toning bath with your silver bath you have simply precipitated a portion of the silveras a chloride, carbonate, acetate, &c., the exact character of the precipitate depending on the constitution of the toning bath. All you can do is to remove the precipitate and recover the silver by reducing it. Then test the clear solution, and ascertain to what extent it is weakened ; sufficient nitrate of silver should then be added to make up the proper strength again. 2. A bath which has been used for exciting collodion plates does not give brilliant results when used for paper. In any case you should get rid of as much of the iodide as possible by precipitation, as recommended by Mr. Hardwich ; that is, adding a few drops of a solution of citric acid, which, forming a precipitate of citrate of silver, will carry down some of the iodide of silver. A. R.—A mixture of bichromate of potash and gelatine, when exposed under a transparent positive, and then soaked in water, will give an image in relief; from a gutta-percha mould of which an electrotype taken would pre sent a block, the raised parts of which would print the blacks of the pic ture. The property possessed by gelatine, or similar substances, in com bination with bichromates, of being rendered insoluble by light, is the germ of the greater part of the helioplastic processes. In the process referred to, the parts acted upon by light are insoluble, and are not, therefore, affected by water; whilst the parts not affected by light retain the ordinary property of gelatine when soaked in water, which is, of • course, to swell up. , D. W.—The formula and manipulations referred to are, as stated, those of Mr. England. When he states that development is to be effected with «the usual three-grain pyrogallic acid solution,” we presume him to mean three grains of pyrogallic acid to an ounce of water, with the usual amount of acetic acid, or citric acid, and a few drops of silver solution. Bradford.—Dr. Hill Norris’s plates are generally developed with pyrogallio acid; but if, as you state, you exposed one under a negative for a minute without obtaining a trace of an image on development with iron, it is pro bable you omitted to add any silver solution to the iron, in which case yon would not, of course, obtain an image. An exposure of a minute to day light should be much too long. As you describe your operations, they are correct; but we presume you neglected to add silver to your developer, an omission which persons unaccustomed to dry plates not unfrequently make. You will find many articles on producing transparencies in our back volumes; we may especially mention one on page 410 of the 6th volume. A London Amateur.—Our opinion coincides with your own as to B. 2. W should recommend B 1, as satisfactorily combining both the capabilitis you require. 3. With A 3 you must have stereoscopic lenses as we, 4. So far as our experience goes, the B are in all respects at least quite equal to A. . . Thomas Jones.—Messrs. Marion and Co., of Soho Square, publish origili portraits of the Prince and Princess of Wales and of some other members of the Royal Family. Good Night.—We arc very highly gratified with your specimens as illustra tions of the value of the information referred to. Some of them arc very perfect indeed, and equal to those produced by professional photographe of high standing, and all exhibit very careful and intelligent manpulatirl and much good taste. We have little to criticise in them or suggest 1 their improvement. Your lens is, as you doubtless are aware, not duE equal to producing male standing figures. Take care to keep youracc. sories quiet and subdued, and the same with pictorial backgrounds, sugg, tion rather than definite making out, is all that is required in each. Mas of your pictures are very good in this respect, but some are scarcely s quiet as might be desirable. If you continue to progress in the direct you have done, your work will be inferior to none; it is now superior much with more pretension. Regarding the rapidity of lenses, the rule • other things being equal, that the larger the aperture in relation to length, the quicker the action, therefore the latter of the two to which-ou refer would be quickest, and give the best results. Both by the maker it, name, are, however, good. If you have length of room, and can afodon we should recommend the larger one. The salaries of operators in —oneas vary very much. We should say they range from two guineas to five gui the a week, depending on the ability of the operator and the character ° establishment. We shall be glad to hoar further from you. make Young Photo.—Your specimens arrived so muoh broken that we could Ider very little of them. So far as we can judge the fault is simpl!uad exposure. No. 1. appears to be a fogged plate from using a bath 14 add condition. Possibly a little nitric acid would remedy that. I no otl carbonate of soda and sun the bath. The other two plates appeared, dny to be very much under-exposed. It is difficult to say how late in thring you may produce pictures ; generally, any time up to sun set, but reduan very long exposures, as the sun is declining. A few lessons fro® ve capable professional photographer would help you very much i n the cannot recommend any one in these columns. A low temperature i operating room generally makes operating altogether slower, Several correspondents in our next.
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