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The photographic news
- Bandzählung
- 7.1863
- Erscheinungsdatum
- 1863
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- Englisch
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- F 135
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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. 276, December 18, 1863
- Digitalisat
- SLUB Dresden
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Zeitschrift
The photographic news
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Band
Band 7.1863
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- Titelblatt Titelblatt -
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- Register Index 619
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Band
Band 7.1863
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December 18, 1863.] THE PHOTOGRAPHIC NEWS. 611 has been added, just in the same way as may be experienced in neutralizing a nitrate of silver bath with oxide of silver. It is hardly to be wondered at that the paper, being exposed to nitric acid, free soda, free carbonic acid, and being on the solution while such a chemical reaction takes place in the same, will turn all sorts of colours. The best remedy for the complaint will be to get good nitrate of soda; but if he has not got it, add nitric acid to the bath in small quantities, and let it stand, frequently stirring for a day or two, then test again, a rd if it has not a slightly acid reaction add a little more acid, and let it stand again, until it is permanently acid. Hoping this hint may be of use to your correspondent, I remain, dear sir, yours, ’ August Busch. Sik,—On roading “ Another Photographer’s Assistant’s” communication, I quite agree that it is unaccountable his prints becoming green. I should recommend that he brings his bath to a boiling temperature, add its bulk of water, then forty grains to the ounce of nitrate of soda (i.e., if ho is certain that it contains eighty grains of nitrate of silver), add nitric acid till slightly acid. If this does not get him out of his difficulty, the fault must be in the paper, or • Photographer’s Assistant” has got something else in it (his bath). I have always obtained the best results by having double (at least) the quantity of nitrate of soda to that of silver. By-the-bye, I have lately had a troublesome negative bath (pin-holes in millions). I added its bulk of water, filtered out the iodide, evaporated nearly to crystallization, made it up to more than its original quantity and strength, added water to the collodion, got fresh iron collodion, acetic acid, &c., with no better results, when I hit on the following “ perfect cure— To each pint of bath I added an ounce of prepared chalk, shook and filtered, then added, acid nitric till the bath worked clear. No doubt there was a quantity of foreign matter in the bath, which all previous treatment failed to remove.—I remain, sir, yours respectfully, Publicolo. P.S.—I may state that I sunned and neutralized the bath With no success. London, Dec. lith, 1803. Dear Sir,—I think that, as a photographer, ” Another Photographer’s Assistant ” should have known better than to expect to obtain the same results as others if he did not strictly adhere to the formulas given. Now, if ho will refer to the first published formula, he will find that “Publico,” (Photo- obaphic News, April 24th), insists upon an excess of nitrate of soda being present if wo are to obtain the best results, and the Editor’s remarks thereon confirm the same. “Au Amateur,” in the number for July 17th, gives the same formula, and speaks very highly of it. Again, in the number for October 16, we find a formula still with an excess of nitrate of soda, as also iu the numbers for October 30th, and December 4th. Your correspondent himself seems to know that it should bo so when ho mentions the one who gets prints of unsurpassed brilliance on an 80-grain soda and 30 or 40-grain silver bath, and yet, in the face ot all this, ho makes a bath by adding 30 grains soda to a 40-grain silver bath, and then wonders that lie does not get good results. In the next place it would be well if he took the advice of the Glenfield starch manufacturers, and when he asks for nitrate of soda “ see that ho gets it,” for the latter part of his letter reads very much as if ho had been supplied with a sample of common soda instead of nitrate of soda; and if such was the case he canuot be surprised that it should dissolve off the albumen. I would advise him to try again, with a fresh example and an excess of the same in his next bath. Enclosed are three prints on Schering’s albumenized paper from the same negative. No. 1 floated four minutes on solution, 60 grains nitrate of silver to the ounce, without any other addi tion whatever. No 2, floated five minutes on solution, 35 grains nitrate of silver and 80 grains nitrate of soda to the ounce; and No. 3 floated 30 minutes on solution, 5 grains nitrate of silver, and 60 grains nitrate of soda to the ounce. They are all toned and fixed iu the same bath. Please say what you think of them as the productions of a Greenhorn. December 15th, 1863. [Those with the weak solution of silver are certainly equal to that with a GO-grain nitrate solution.—Ev.] Electric Light. Sir,—I am sorry to say my progress with Ruhmkorff induction coils, about which I wrote some time ago, has been but a poor one up to now, for the following reasons :— Firstly, my time has been too much taken up by my business, so that I could not possibly devote to the subject the attention I could have wished to give it. Then, of the two makers of coils whom I know, the one did not seem inclined to push the matter, and the other will have all his hands occupied for two or three months to come, by a large order for Australia, so that he could not undertake any fresh orders, nor had he any stock on hand. A good friend of mine in Birmingham, who is a very skilful photographer, wished to make some experiments, and saw the latter maker several times, but, at the time that I thought ho was experimenting, he wrote to say he could not get a proper coil to do it with. I applied to two London firms, not makers, but was asked such prices for the apparatus, that I did not think of recommending them. Up to now, I have not been able to find out any London maker; I dare say there are several, but I do not know them. Thus I have been compelled, to'my great regret, to disappoint those correspondents who take an interest in the matter. Mr. T. R.Williams told me some time ago, that he has made a series of experiments with the Ruhmkorff coil at the Polytechnic long since ; of this I was not aware when I wrote my letter, or else I should of course not have thought of recommending attempting to use the light for portraiture. Still, for printing purposes, it may do nevertheless. Should I find out a respectable London maker of coils and batteries, I shall not delay communicating it to those corre spondents who have applied for it, for I still think those coils, and the powerful light they give, may be advantageously applied for printing purposes.—Believe me, dear sir, your obedient servant, August Busch. Wulk in the Studio. A “ Lift ” in A Photographic Gallery.—An action was tried a few days ago, in the Court of Common Pleas, to recover the price of a “lift,” intended to raise sitters from the basement to the top of the house without the trouble of walking upstairs. The plaintiff, Mr. Gerish, an engineer and ironfounder, carrying on business at East Road, Hoxton, sued the defendant, Mr. Bernstingl, a photographic artist, in Regent Street, to recover the sum of £55 for making a lift and fixing the same on the defendant’s premises. The defendant’s photographic rooms being at the top of the house as usual, for the purpose of obtaining the light, it occurred to the defendant that it would be an accommoda tion to his customers if the fatigue of climbing up the stairs could be avoided, and he put himself in negotiation with the plaintiff, who has been accustomed to make lifts, or small ascending rooms, wound up by chains and machinery from below to any required height, for houses in the city. The plaintiff, in February last, agreed to make a lift for the defendant for £50, and the extra £5 was for cutting away brickwork, &c., in order to fit the same. The lift was made and fitted, and tried, and found to work, six persons being elevated thereby to the photographic room. The defence to the action was that the lift was so defectively made as to be useless, and incapable of being worked easily, and that the plaintiff had been required to take it away, and that it was now at the defendant’s premises only a nuisance. The evi dence on the part of the defendant was to the effect that though a person might be raised up to the defendant’s room, yet it was by a series of jerks. The jury ultimately found a verdict for the plaintiff for £55, the learned Judge reserving leave for the defendant to move to reduce the amount of the verdict upon a point of law made by Mr. Joyce. Artificial Light for Enlargement.—Mr. Aldis, of Baker Street, has recently shown us some excellent enlarge ments produced by an adaptation of the oxyhydrogen light to the solar camera. The exposures range from half a minute to 10 minutes, depending upon the amount of enlargement. De velopment printing is of course used, but an exceedingly good tone, free from the unpleasant green tint sometimes seen, is obtained. The capability of successfully using artificial light for enlargements, instead of waiting for direct sunlight, cannot well be over-estimated in a country where sunshine can never be guaranteed.
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