Suche löschen...
The photographic news
- Bandzählung
- 12.1868
- Erscheinungsdatum
- 1868
- Sprache
- Englisch
- Signatur
- F 135
- Vorlage
- Hochschule für Grafik und Buchkunst Leipzig
- Digitalisat
- Hochschule für Grafik und Buchkunst Leipzig
- Digitalisat
- SLUB Dresden
- Lizenz-/Rechtehinweis
- Public Domain Mark 1.0
- URN
- urn:nbn:de:bsz:14-db-id1780948042-186800009
- PURL
- http://digital.slub-dresden.de/id1780948042-18680000
- OAI
- oai:de:slub-dresden:db:id-1780948042-18680000
- Sammlungen
- Fotografie
- LDP: Historische Bestände der Hochschule für Grafik und Buchkunst Leipzig
- Strukturtyp
- Band
- Parlamentsperiode
- -
- Wahlperiode
- -
- Bandzählung
- No. 501, April 9, 1868
- Digitalisat
- SLUB Dresden
- Strukturtyp
- Ausgabe
- Parlamentsperiode
- -
- Wahlperiode
- -
-
Zeitschrift
The photographic news
-
Band
Band 12.1868
-
- Titelblatt Titelblatt I
- Kapitel Preface III
- Ausgabe Ausgabe 1
- Ausgabe Ausgabe 13
- Ausgabe Ausgabe 25
- Ausgabe Ausgabe 37
- Ausgabe Ausgabe 49
- Ausgabe Ausgabe 61
- Ausgabe Ausgabe 73
- Ausgabe Ausgabe 85
- Ausgabe Ausgabe 97
- Ausgabe Ausgabe 109
- Ausgabe Ausgabe 121
- Ausgabe Ausgabe 133
- Ausgabe Ausgabe 145
- Ausgabe Ausgabe 157
- Ausgabe Ausgabe 169
- Ausgabe Ausgabe 181
- Ausgabe Ausgabe 193
- Ausgabe Ausgabe 205
- Ausgabe Ausgabe 217
- Ausgabe Ausgabe 229
- Ausgabe Ausgabe 241
- Ausgabe Ausgabe 253
- Ausgabe Ausgabe 265
- Ausgabe Ausgabe 277
- Ausgabe Ausgabe 289
- Ausgabe Ausgabe 301
- Ausgabe Ausgabe 313
- Ausgabe Ausgabe 325
- Ausgabe Ausgabe 337
- Ausgabe Ausgabe 349
- Ausgabe Ausgabe 361
- Ausgabe Ausgabe 373
- Ausgabe Ausgabe 385
- Ausgabe Ausgabe 397
- Ausgabe Ausgabe 409
- Ausgabe Ausgabe 421
- Ausgabe Ausgabe 433
- Ausgabe Ausgabe 445
- Ausgabe Ausgabe 457
- Ausgabe Ausgabe 469
- Ausgabe Ausgabe 481
- Ausgabe Ausgabe 493
- Ausgabe Ausgabe 505
- Ausgabe Ausgabe 517
- Ausgabe Ausgabe 529
- Ausgabe Ausgabe 541
- Ausgabe Ausgabe 553
- Ausgabe Ausgabe 565
- Ausgabe Ausgabe 577
- Ausgabe Ausgabe 589
- Ausgabe Ausgabe 601
- Ausgabe Ausgabe 613
- Register The Index To Volume XII 619
-
Band
Band 12.1868
-
- Titel
- The photographic news
- Autor
- Links
- Downloads
- Einzelseite als Bild herunterladen (JPG)
-
Volltext Seite (XML)
180 THE PHOTOGRAPHIC NEWS. [April 9, 1868. evaporated from old negative baths, and I find it quite equal to new. Sugar added to the printing-bath is a great success ; but how long the paper will keep in summer remains to be proved. Probably, in very hot weather, more sugar may be required. I enclose a street view taken with a bath doctored with cyanide evaporated to dryness, and made 35 grains to the ounce, but I do not think a bath treated with cyanide lasts long.” Col. BURKE’s Photograph.—An order - was made a few days ago upon a photographer to deliver up all portraits and negatives in bis possession of a portrait of Col. Burke, which had been published, and the registration at Stationers’ Hall was ordered to be cancelled. Raphael Reproductions.—The collection of photographs, engravings, &c., of Raphael’s works, commenced by the late Prince Consort, has been continued by the Queen. It will ultimately be bound in about 50 or 60 huge volumes, and at the present time a catalogue of the whole collection, which has been compiled by Mr. Roland, formerly librarian to his Royal High ness, and who has had the largest share in the labour of form ing it, is being rapidly carried through the press. It is under stood that though this work is, in the first instance, intended by Her Majesty for distribution in the way of presents among her personal friends, foreign Sovereigns, and others who have aided in carrying out the Prince’s plan, a special edition will after wards be published for the use of amateurs and Raphael collectors. Photographic Convention in America.—A national con vention of photographers will be held in the United States in course of the present month, to consider many subjects at pre sent affecting the general interests of the profession. The bro mide patent, the tax upon photography, the prices of photo graphs, and various other topics, willbe brought under attention, and motions passed with regard to them. U0 Omspunbents. Photographer (Derby).—Streaks on the plate may be duo to various causes : floating scum on the surface of the solution, im mersion before the collodion is sufficiently set, alkalinity, insuf ficient iodizing-, or excessive strength of the solution will tend to this result. To avoid it, see that there is no floating scum on your bath, that the solution has a slightly acid reaction, and avoid immersing the plate until the film is sufficiently set; also, when there is a tendency to streaks, keep the plate in motion all the time it is in the bath, from the moment of immersion until it is ready for use. 2. Marblings may also arise from various causes, as they are of various kinds. If you will describe specifically those which trouble you, we will endeavour to help you to a remedy. 3. For photographing interiors, double or triple com binations are necessary, as single lenses will give curved lines. A portrait lens may be made to answer very well. W. J. A. G.—Much depends on circumstances. If a very slight increase of intensity is required in the finished negative the use of tincture of iodine, to turn the deposit to an olive tint, is very efficient; but care is necessary in using this, because if its operation is continued too long the colour becomes of a light yellow tint, not at all non-actinic, and the molecular character of the deposit is changed, so that light is easily transmitted, and the negative is made less vigorous than before. The method recommended by Mr. England, in which the varnish is removed by alcohol, and the negative intensified with an alcoholic solution of pyro and silver, gives a little more control over the operations. You will find it described in detail in our Year-Book for 1867, p. 64. 2. For intensifying before fixing the use of an iron solution with a trace of silver involves the least trouble. For intensifying after fixing pyrogallic acid and silver is, we think, more efficient than an iron solution. 3. Two thicknesses of the black twill you enclose may be safely used, we think, for covering a dark tent. C. Burton.—Much depends on your skill and experience, as to whether it will be wise for you to attempt to albuminize the paper yourself. It is not a difficult operation; but still, unless you have had some experience, we cannot advise you to rely on your own operations, but should rather recommend you to send the stock of plain paper you have to some one engaged in the busi ness to albuminize for you. If you wish to try, beat up the whites of fresh eggs thoroughly, and add 6 grains of chloride of ammo nium to each ounce of albumen solution. Float for half a minute, and hang up the sheets in a room at a temperature of from 70° to 80° Fah. J. B,,N.—If you find the collodion too thin, and the negatives are lacking in vigour, you may, without any impropriety or risk, add more pyroxyline ; we should think at the rate of about 1 grain to each ounce of collodion. But your safest plan will be to experi ment on a small quantity (say a couple of ounces) before touching the bulk. If, on trial, this is satisfactory, you can then deal with the whole. R. Gill (India).— We fear that, from some cause, a combination which takes place between the silver and the size in the paper be comes decomposed before the prints are fixed, and an insoluble silver compound remains in the paper, causing the dirty brown, mottled, opaque markings seen on looking through the print. It is difficult, without a more precise history of the case, to indicate accurately the cause of the evil, but we may make some sugges tions which, if observed, will probably remove it. See that your albuminized paper is not kept in a damp place, and that it is not used when any indication of decomposition in the albumen is pre sent. Do not use the silver bath too strong, nor float too long: a 40-grain bath, with three ounces of alcohol in each pint of solu tion. Keep the sensitized paper dry, and print, tone, and fix as soon after the paper is prepared as possible. Use a very strong fresh hypo bath. Try omitting the fuming ; we scarcely recom mend fuming in a hot climate unless the silver bath contain free nitric acid. If fuming be applied, the paper should be printed, toned, and fixed immediately after. The opaque mottling might be due to imperfect fixation only, but, from the discoloured appear ance you describe as being present before fixing, it is evident that some decomposition takes place in the sensitized paper. Collodion.—The proportion of water present in a toning bath regu lates the rapidity of the operation, but beyond that it is not impor tant. Various formulae vary in giving from 2 ounces to 10 ounces of water to a grain of chloride of gold. In very hot weather, when the bath is active, we should probably use 8 or 10 ounces of water; in winter not more than 5 ounces. 2. The process of com plete development ought not to require anything like an hour; a Quarter of an hour would be a full time. 3. Be so good as to state etails of your experiment with the morphine process, so that we may, possibly, point out the cause of failure. 4. The use of a trace of a bromide in alkaline development is to prevent fog, which it does very effectually; too much would retard development. R. M. D.—The mottling and faintness of the print are due to the use of a weak silver bath, or to imperfect contact of the albumin ized paper with the solution. Sometimes, when too small a quan tity of the silver solution is employed, so as to cover the bottom of the dish imperfectly, such a result will follow. J. L.—The explanation is what wo anticipated; but it merely show# how erroneous -was the original statement. An intermittent exposure during different parts of an hour is not an hour’s expo sure, inasmuch as the plate is not exposed during each interval in which the lens is covered. 2. The process of covering the lens during movement of foliage, and uncovering so as to secure the brief intervals of stillness, is not altogether unusual; but it requires great care, and shows most praiseworthy patience. 3. Thanks; but the compilation would not possess sufficient interest for publication. Reader of the News.—The query in your former letter men tioned sulphate of soda. The accidental addition of phosphate of soda to hyposulphate of soda would, probably, be without any action in fixing, especially if care were taken to keep the fixing bath of full strength. Its precise result is, however, matter which can only be decided by experiment. Phosphate of silver, if formed, is not soluble in hyposulphite of soda. Try the effect in a small experiment before risking many prints. 2. The dog is capital. Young Photo.—The forms for registration are one penny each. Our Publisher will obtain some for you if you send him stamps and a stamped and addressed envelope. He will also super intend the registration if you send him the form properly filled up, and the office fee Is., and 6d., in stamps. Several correspondents in our next. Owing to the necessity of going to press a day earlier this week, a larger number of correspondents than usual are necessarily loft over. Photographs RegistereD. Mr. J. Collings, Cardiff, Two Photographs of Marquis of Bute. Mr. R. CARLYLE, Grassmere, Photograph of Port Wordsworth. Mr. R. Cade, Ipswich, Photograph of J. P. Cobbold, Esq. Photograph of R. C. Ransom, Esq. Mr. A. Clarke, High Street, Stourbridge, Photograph of Rev. C. II. Craufurd. Messrs. Appleton, Bradford, Lithograph of Rev. C. Garrett. Lithograph of Rev. P. McKenzie. Lithograph of Rev. J. Rattenbur y Mr. E. Harrison, Newcastle, Staff., Photograph of Bishop Selwyn.
- Aktuelle Seite (TXT)
- METS Datei (XML)
- IIIF Manifest (JSON)