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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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- http://digital.slub-dresden.de/id1780948042-18830000
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- Bandzählung
- No. 1295, June 29, 1883
- Digitalisat
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Zeitschrift
The photographic news
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- Titelblatt Titelblatt I
- Register Index III
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416 THE HOTOGRAPHIC NEWS. June 29, 1883. A Novel SUaGESTION.—“ Would it not be as well for the portraits of general managers of railways to be published, so that travellers might have the pleasure of recognising these “ worthies,” and giving them a welcome cheer occasionally ?”— Jtodern Society. PHOTOGRAPHIC Club.—At the next meeting of this Club, July 4th, the subject for discussion will be “ Adjourned Discussion upon the Most Rapid Lenses for Instantaneous Work embracing a certain Angle.” 0o " orresgorents. *,* We cannot undertake to return rejected communications. G. M.—1. As far as we know, they are not to be bought. 2. Yes. 3. The picture is a collotype, and if you read our leader about photography on wood blocks, you will gather some general notions regarding the method. II. B. B.—You will find no remedy but changing your paper, as it has nothing to do either with the albumenizing or sensitizing. R. Young.—1. You do not say what kind of a sensitive film you require; but perhaps the formula given in our second leader of this week will answer your purpose. 2. “ Heliographie,"’ by J. Husnik, published by Hartleben, of Vienna. It costs about 4s. or os., and can be ordered of Triibner, Ludgate Hill. G. W. B.—You do not tell us enough about it for us to give you an opinion. There certainly is a trace of hypo in the card ; but as the whole surface is so well enamelled over, we imagine not much mischief is likely to ensue, unless the pictures are exposed to damp. See Mr. Ashman’s article in this number. Cape op Good Hope.—Trade is generally bad at present, and a time of depression always affects photographers considerably. Write to the general agent for Cape Colony. A. Borland.—The best description is to be found in Husnik’s “ Heliographie.'' It is published by Hartleben, of Vienna, and costs about 4s. or 5s. We shall give a detailed description of the method soon. Otto PFENNINGER.—The mercury has doubtless united with sulphur from the gas, and we fancy from your description that you have placed the regulator too near to the source of heat. Of course the expansion chamber must be in the heated space, but it may be connected with the regulator by any required length of tube. The compound-bar principle is an excellent one, and you will probably obtain something of the kind from any large dealer in chemical apparatus. R. Brown Smith.—Thank you for the very effectively posed character-study. As you ask us to find a fault, we would suggest that the face is a trifle dark, and the picture might be improved by being covered with mineral paper at the back ; after which it should be shaded with black lead and a paper stump. J. C.—We have not the address, but will endeavour to obtain it. A. G. B.—We would advise you to make three light wooden frame®, and hinge them together somewhat after the fashion of an old- fashioned clothes-horse. You must also provide a fourth frame, which can be mounted over the top so as to carry a shade for the head. For fixing the frames together, and for attaching the calico, nothing is better than ordinary bradawls. 2. Use un bleached or light brown calico. F. Hoare.—It is doubtless, as we said, that the toning has not been carried far enough; the real reason for this being the deposition of the gold as a dark sediment. Discard the old bath and make up a fresh one. Phototype.—There are probably between twenty and thirty firms now engaged in making phototypic blocks from negatives after nature, but only a small proportion of them are located in this country. Silver.—As the addition of hydrochloric acid would throw the whole of the metal down in the form of chloride, it is easy to understand the reason of your failure. F. C. P.—Although it absorbs a certain amount of moisture from damp air, it would hardly rank as a deliquescent salt. C. T. Potter.—Although cardboard is usually employed, there appears to be no reason why your proposal should not lead to useful results. Alpha.—Write to Mr. W. Harland (Secretary) 83, Hawkesley Road, Stoke Newington, London, N. PHOTOGRAPHS REGISTERED. )r. A. BEATTIE (Preston)—3 Photos, of Rev. Father Walker. Messrs. Andrews and Villiers (Swansea and Newport)—2 Photos, of Groups of Gentleman in uniform and in private dress. Mr. ANCKORN (Arbroath, N.B. )— Photos, of Revs. A, Mill, W. Proudfoot, and J. Howet, THE EVERY-DAY FORMULARY. The GELATINO-BROMIDE Process. Emulsion.—A—Nit. silver 100 grains, dist. water 2 oz. B—Bromide potassium 85 grains, Nelson’s No. 1 gelatine 20 grains, dist. water 1A 0Z:a one per cent, mixture of hydrochloric acid and water 50 minims. C—Iodide potassium 8 grains, dist. water 2 oz. D—Hard gelatine 120 grains, water several oz. When the gelatine is thoroughly soaked, let all possible water be poured off D. A and B are now heated to about 120° Fahr., after which B is gradually added to A with constant agitation; C is then added. Heat in water bath for half an hour, and stir in D. After washing add oz. alcohol. Pyro. Developer.—No. 1—Strong liq. ammonia 11 oz., bromide potas sium 240 grains, water 80 oz. No. 2—Pyro. 30 grains, water 10 oz. In case of an ordinary exposure mix equal vol. Iron Developer.—Potassium oxalate sol. (1 and 4) 80 parts, ferrous sulphate sol. (1 and 4) 20 parts, dist. water 20 parts. To each 4 oz. of the mixed developer add from 5 to 30 drops ten per cent. sol. potassium bromide, and 30 drops sol. sodium hyposulphite (1 and 200). Substratum or Preliminary Preparation.—Soluble silicate of soda 1 part, white of egg 5 parts, water 60 parts. Beat to froth and filter. Fixing.—Sat. sol. of sod. hypo. 1 pint, sat. sol. of alum 2 pints, mixed. Cowell’s Clearing Solution.—Alum 1 part, citric acid 2 parts, water 10 parts. Edwards makes this sherry coloured with perchloride iron. Eder’s Method of Intensification.—The negative is whitened by soaking in sat. sol. of mercuric chloride, and after thorough rinsing immersed in potass, cyan. lOparts, potass, iod. 5 parts, mercuric chloride 5 parts, water 2,000 parts. As film becomes dark brown, the actinic opacity is increased; but prolonged action causes brown tint to become lighter, until at last the negative is no denser than at first. Fol’s Backing Sheets.—A chromographic paste is prepared with gelatine 1 part, water 2 parts, glycerine 1 part, and a very small addition of Indian ink. Strong paper or shirting is coated, and the sheets are laid, face downward, on waxed glass to set. Press to back of glass plate. The Wet Collodion Process. The Nitrate Bath.—Water 14 oz., nit. silver 1 oz., nitric acidl drop. Before using coat a small plate, and immerse it for 20 minutes. Cleaning Preparation for New Plates.—Alcohol 4 oz., Jewel ler’s rouge 4-oz., liquid ammonia J-oz. Film-removing Pickle for Old Plates.—Water 1 pint, sulphuric acid 4 fluid oz., bichromate potassium 4 oz. Substratum.—Whites of 2 eggs well beaten, 6 pints of water, and 1 dr, liq. ammon. Negative Collodion for Iron Development.—Alcohol 1 pint, pyroxyline of suitable quality 250 grains, shake well and add ether 2 pints. Iodize this by mixing with one-third of its volume of alcohol A pint, iod. ammon. 80 grains, iod. cadm. 80 grains, brom, ammon. 40 grains. Normal Iron Developer.—Water 10 oz., proto-sulphate iron A oz., glacial acetic acid } oz., alcohol { oz. The amount of proto-sulphate iron may be diminished to 4 oz. when full contrasts are desired, or increased to 1 oz. when contrasts are unduly marked. With new bath quantity of alcohol may be reduced to } oz.; but when bath is old more is wanted. Intensifying Solution.—Water 6 oz., citric acid 75 grains, pyro. 30 grains. When used, add a few drops of the silver bath to each ounce. Lead Intensification.—After neg. washing, immerse in dist. water 100 parts, red pruss. potash 6 parts, and nit. lead 4 parts. When it is yellowish white wash and immerse in liquid sulphide ammon. 1 part, water 4 parts. Fixing Solution.—1. Potass, cyanide 200 grains, water 10 oz. 2. Sat. sol. of sod. hypo. Varnish.—Shellac 2 oz., sandarac 2 oz., Canada balsam 1 dr., oil of lavender 1 oz„ alcohol 16 oz. Printing Processes. Albumen Mixture for Paper.—White of egg 18 oz., 500 grs. ammon. chlor, in 2 oz. of water. Beat to a froth, stand, and filter. Sensitizing Solution.—Nit. silver 50 grs., water 1 oz., sod. carb. J gr. Acetate Toning Bath.—Chi. gold 1 gr., acet, soda 20 grs., water 8 oz. Lime do.—Chi. gold 1 gr., whiting 30 grs., boiling water 8 oz., sat. sol. chi. lime 1 drop. Filter cold. Bicarbonate do.—Chi. gold 1 gr., bicarb, soda 3 grs., water 8 oz. Fixing Bath.-Sodium hypo. 4 oz.,water 1 pint,liq. ammon. 30 drops. Reducer for Deep Prints.—Cyan, potass. 5 grs., liq. ammon. 5 drops, water 1 pint. Encaustic Paste.—Best white wax 1 oz., oil of turpentine 5 oz. Sensitizing Bath for Carbon Tissue.—Bichromate potash oz. f water 30 oz., ammonia 1 dr., methylated spirit 4 oz. Enamel CoHodion.—Tough pyroxyline 120 grs., methylated alcohol 10 oz., ether 10 oz., castor oil 20 drops. Mountant.—1. Fresh solution of best white gum. 2. Fresh starch. Collotypic Substratum.—Soluble glass 3 parts, white of egg 7 parts, water 10 parts. Collotypic Sensitive Coating.—Bichromate potash ] oz., gela tine 22 oz., water 22 oz. Collotypic Etching Fluid.—Glycerine 150 parts, ammonia50 parts, saltpetre 5 parts, water 25 parts. Printing on Fabric.—Remove all dressing from fabric by boiling in water containing a little potash, dry, and albumenize with ammonium chloride 2 grammes, water 250 cubic cents., and the white of 2 eggs, all being well beaten together. A 70-grain silver bath is used, and the remain ing operations are as for paper. Cyanotype Printing.—Water 1 oz., red prussiate of potash (ferri cyanide) 1 dr., ammonio citrate of iron 1 dr. Prepare and preserve in the dark. Float the paper and dry. Fixation by mere soaking in water. Various. Luckardt's Retouching Varnish.—Alcohol 300 parts, sandarac 50 parts, camphor 5 parts, castor oil 10 parts, Venice turpentine 5 parts. Matt Varnish.—Sandarac 18 parts, mastic 4 parts, ether 200 parts, benzole 80 to 100 parts. Encaustic Paste.—Best white wax, in shreds, 1 oz., turpentine 5 03. > dissolve in gentle heat, and apply cold with piece of flannel. Ferrotypes. Collodion.—Ammonium iodide 35 grains, cadmium iodide 25 grains, cadmium bromide 20 grains, pyroxyline 70 grains, alcohol 5 oz., ether 5 oz. Bath. — Silver nitrate 1 oz., water 10 oz., nitric acid 1 drop. Developer.—Ferrous sulphate 1 oz., glac. acetic acid 1 oz., water 16 O" Fixing and Varnish,—Same as wet collodion process.
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