Suche löschen...
The photographic news
- Bandzählung
- 29.1885
- Erscheinungsdatum
- 1885
- 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-id1780948042-188500006
- PURL
- http://digital.slub-dresden.de/id1780948042-18850000
- OAI-Identifier
- oai:de:slub-dresden:db:id-1780948042-18850000
- Sammlungen
- Fotografie
- LDP: Historische Bestände der Hochschule für Grafik und Buchkunst Leipzig
- Bemerkung
- Seite I-II fehlen in der Vorlage. Paginierfehler: Seite 160 als Seite 144 gezählt.
- Strukturtyp
- Band
- Parlamentsperiode
- -
- Wahlperiode
- -
- Bandzählung
- No. 1386, March 27, 1885
- Digitalisat
- SLUB Dresden
- Strukturtyp
- Ausgabe
- Parlamentsperiode
- -
- Wahlperiode
- -
-
Zeitschrift
The photographic news
-
Band
Band 29.1885
-
- Register Index III
- Ausgabe Ausgabe 1
- Ausgabe Ausgabe 17
- Ausgabe Ausgabe 33
- Ausgabe Ausgabe 49
- Ausgabe Ausgabe 65
- Ausgabe Ausgabe 81
- Ausgabe Ausgabe 97
- Ausgabe Ausgabe 113
- Ausgabe Ausgabe 129
- Ausgabe Ausgabe 145
- Ausgabe Ausgabe 161
- Ausgabe Ausgabe 177
- Ausgabe Ausgabe 193
- Ausgabe Ausgabe 209
- Ausgabe Ausgabe 225
- Ausgabe Ausgabe 241
- Ausgabe Ausgabe 257
- Ausgabe Ausgabe 273
- Ausgabe Ausgabe 289
- Ausgabe Ausgabe 305
- Ausgabe Ausgabe 321
- Ausgabe Ausgabe 337
- Ausgabe Ausgabe 353
- Ausgabe Ausgabe 369
- Ausgabe Ausgabe 385
- Ausgabe Ausgabe 401
- Ausgabe Ausgabe 417
- Ausgabe Ausgabe 433
- Ausgabe Ausgabe 449
- Ausgabe Ausgabe 465
- Ausgabe Ausgabe 481
- Ausgabe Ausgabe 497
- Ausgabe Ausgabe 513
- Ausgabe Ausgabe 529
- Ausgabe Ausgabe 545
- Ausgabe Ausgabe 561
- Ausgabe Ausgabe 577
- Ausgabe Ausgabe 593
- Ausgabe Ausgabe 609
- Ausgabe Ausgabe 625
- Ausgabe Ausgabe 641
- Ausgabe Ausgabe 657
- Ausgabe Ausgabe 673
- Ausgabe Ausgabe 689
- Ausgabe Ausgabe 705
- Ausgabe Ausgabe 721
- Ausgabe Ausgabe 737
- Ausgabe Ausgabe 753
- Ausgabe Ausgabe 769
- Ausgabe Ausgabe 785
- Ausgabe Ausgabe 801
- Ausgabe Ausgabe 817
-
Band
Band 29.1885
-
- Titel
- The photographic news
- Autor
- Links
- Downloads
- Einzelseite als Bild herunterladen (JPG)
-
Volltext Seite (XML)
March 27, 1885.] THE PHOTOGRAPHIC NEWS 197 nt DO X Each pane in the The room is well built throughout, and carefully finished s it on । ild •of or- we use it the e” b, e of al res of in og te is ip Ve ug on ire ot Id en ow 'he the th all er. Ige ht to rs, ad p b- e plan of placing a small lump of gum-camphor and a crystal of alum in the filter tended very much to keep the paper, and prevent blisters. These methods, of course, refer to freshly-sensitized papers. Preserved sensitive paper occasionally exhibits a very troublesome form of blister, inasmuch as fully one-half of the image is often so detached. The makers generally recommend the final washing before toning to consist of an alkaline bath; if the alkaline solution used be dilute, there is not the least doubt but its effect will prove bene ficial, so far as it assists rapid toning ; but assuming there be acid used in the preservation of the paper, and the alkaline carbonate bath be too strong for the purpose, it is From the ground plan it may be seen that the total length of the room is thirty-six feet, the portion really constituting the studio, the only part lighted, is twelve feet wide by thirteen feet long. The unlighted portion, in which the camera stands, is twenty-three feet long by eight feet wide, and the extreme end is divided off to form (4) is also opaque. The only portions having glass are one side of the square or studio portion, and the front sloping portion of the roof (7). With the exception of the glazed parts we have named, the room is chiefly constructed of inch boarding, covered at the roof with asphalte felt. The unilluminated portion is 7 feet high to the eaves, and from thence to the ridge about two feet more. The window marked 2 is of orange glass for the dark-room. The other tlie manipulation ; but alternately boiling and freezing is productive of much annoyance and many blisters. That small blisters do little or no harm under ordinary circumstances is generally conceded ; also that such are usually due to a highly surfaced paper and unequally heated solutions ; but let such prints be exposed in a damp state to very cold air, 32° F., for instance, and it is sur prising how easily the portions of the albumen can be removed ; moreover, upon again soaking prints so exposed in hot water, blisters of large size are readily formed. An experience of this kind is not often met with, still it has been recorded upon one or two occasions, and is worthy of remembrance, since it is one of the failures attributable to the user, and not the manufacturer of albumenized or ready- sensitized paper. Everyone knows that a strong silver bath has a tendency to detach the albumen in very thin skins, more especially during high temperatures ; doubtless those who use pre served paper do not meet with this difliculty, and a precau tion of this kind would only apply to those who sensitize ment of prints in saline baths, made with three per cent, of common salt or ordinary commercial alum, tends greatly to check the after formation of blisters, while they also play the role of eliminators. Other methods have from time to time been published in these pages, and I feel it to be incumbent that some excuse should be offered for quoting experiences of others. My excuse is this. Two serious cases—one occurring in the North and the other in the South—were recently brought under my notice. In both cases portions of the same batch were used, being distributed in the ordinary course, and these were the only cases where blisters were observed. Upon enquiry, it was conclusively proved that the temperature was low upon both the occasions complained of, and an increased temperature resulted in an absence of blisters. the dark-room. The part marked 6 has a tier of shelves for various purposes:— their own paper. With highly-surfaced papers, the writer has often found it necessary to reduce the strength of the sensitizing bath to less than thirty grains of silver nitrate per fluid ounce. Certain remedies might here be mentioned, which, although known to many manipulators, may not be familiar to beginners. To classify the remedies, it may be said that equality of temperature throughout is of primary import ance, and beyond which it is seldom really necessary to seek relief. Next in order may be mentioned the degree of concentration of the sensitizing bath; the stronger the silver bath, the greater the tendency to blister. This was, in a measure, overcome some years ago by a photographer in the United States—Professor Towler, I believe—who replaced an eighth part of the water used in making up the bath with that quantity of alcohol. The only objection to that method was that the paper would not keep in summer time so well as when the alcohol was absent. Anthony’s easy to imagine what would happen. If a violent disen gagement of carbonic acid gas took place within the tex ture of the paper, such a force evolved would be sufficient to separate the two surfaces, and the inevitable result would be blisters, while other portions of the same ream, differently treated, would show no trace of the defect, because the alkaline bath was made with greater care, and the prints were equally acted upon. It is a matter of con siderable importance that this alkaline solution should only be employed in very dilute proportions, since the entire removal of the albumen image is a comparatively easy matter, under alkaline conditions ; therefore, where acid is known to be absent, salt may be substituted for the alkali with considerable advantage. On reference to the sketch of the elevation it will be seen that the studio portion is 12 feet high at the ridge. One side of the studio is all glass, consisting of corrugated glass from the ground to 7 feet high, and from thence to the roof clear white glass. The sloping front light (7) is clear white glass. The opposite side of the studio is opaque, reflected light only being obtained on that side. The roof ar® cry flu- re- ater its • nce ned s wO the we nce ces. Other means for accomplishing the end in view might be reiterated, such as soaking the prints after toning in a bath containing four ounces of common salt per gallon of I small window is to’admit a little light when necessary to water, and a faintly alkaline fixing bath, with which some I the unilluminated portion of the room. Each pane in the printers find it advantageous to put a small quantity of 1 studio has a distinct set of two blinds, one white and the alcohol. When an equal temperature of the washing lotherblack, and the blinds of each pane may each be worked water cannot be relied upon, it is sometimes advisable to 1 quite independent of the other, so as to secure entire con- dilute the fixing bath gradually with water, and thus rid | trol of the light. the prints of the fixing agent in that manner. The treat- THE GLASS HOUSE—HOW TO DESIGN, CON STRUCT, AND FURNISH IT. Chapter I.—Glass Houses, Old and New—Continued. Colonel Stuart Wortle.y’s Studio.—We subjoin the ground plan and elevation, together with a few details of the construction :— to •) i e II
- Aktuelle Seite (TXT)
- METS Datei (XML)
- IIIF Manifest (JSON)