Helmar Lerski

Identifier: americanannualof28newy (find matches)
Title: The American annual of photography
Year: 1914 (1910s)
Authors:
Subjects: Photography
Publisher: New York : Tennant and Ward
Contributing Library: Harold B. Lee Library
Digitizing Sponsor: Brigham Young University

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THE TWINS. EDITH L. WILLIS. If a lantern plate has been rather under exposed a goodaccelerative is Hypo I oz. Water 25 oz. using from 3 to 20 minims of hypo solution to each ounce ofmixed developer. According to Capt. Abney exposure can be reduced one-third by use of the hypo solution, but it is better to avoid itsuse if possible. Ferrous Oxalate has no fogging effects, as it only acts onthe silver that has been affected by the light. The Iron Solu-tion does not keep well and should be kept in small bottleswith waxed corks. The mixed developer also does not keep 88
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PORTRAIT. Helmar Lerski. well, therefore fresh developer is always desirable. If thewater used contains lime there will be a precipitation whichwill be cleared in the Acid Clearing Bath. The Iron developer is the developer for old stale plates asit will not produce markings or stains. All traces of Pyro must be kept away from the Iron devel-oper or black stains or markings will result from the combina-tion of Pyro and Iron salts. Keep a set of dishes for IronOxalate alone. In mixing Oxalate of Potas. Solution let stand twenty-fourhours and decant off clear liquid for use. An alkali reactionmeans a bad quality of Oxalate and is unfit for use.

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Identifier: americanannualof28newy (find matches)
Title: The American annual of photography
Year: 1914 (1910s)
Authors:
Subjects: Photography
Publisher: New York : Tennant and Ward
Contributing Library: Harold B. Lee Library
Digitizing Sponsor: Brigham Young University

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About This Book: Catalog Entry
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d under many brands. One chemical Ican vouch for as being the most useful of all the developers,and that is rodinal. It will do anything that any other de-veloper will, if used properly, does not stain the fingers, workswell in any dilution, and makes splendid prints on anypaper. While I am speaking of rodinal, I want to say a word on itsapplication to color photography. A solution of one partrodinal and nine parts water will develop a color plate forfirst or second development with perfect success. I have beenusing this method for the purpose for the last year, and amperfectly satisfied to leave the mixtures of metol, hydroquinoneand ammonia as well as pyro-ammonia to those who like thesmell of ammonia in their laboratory. One new thing I have found with regard to color plates thatmay be of value to others, and that is a method of developingthese plates (Dufay-Autochrome, and the others) with anordinary light, ruby of course being taken for granted. Makeup a solution as follows— 44
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PORTRAIT. Helmar Lerski. Water lOo cc. io% Potassium Bromide lo cc. Saturated solution of Sodium bisulphate. 2 cc. Bathe your plates, after exposure, in this solution for twominutes. Rinse well in the dark, and you may develop in aruby light as the color sensitiveness is destroyed by this solu-tion. Gradation is not affected and if you are not satisfiedwith working with time and temperature methods, you canobtain excellent results in this way. In speaking of what I consider the most important items ina photographic laboratory, I forgot several things—a Watkinsmeter, and a copy of the Principles and Practise of Photo-graphy, by Alfred Watkins. These two items with a Wat-kins time thermometer should have been mentioned first. In connection with color plates one point must not be for-gotten. If you are photographing dark objects with a colorplate do not forget that your exposure must be increased inthe same ratio as with an ordinary plate, 50 per cent morebeing about right as a general

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Identifier: americanannualof28newy (find matches)
Title: The American annual of photography
Year: 1914 (1910s)
Authors:
Subjects: Photography
Publisher: New York : Tennant and Ward
Contributing Library: Harold B. Lee Library
Digitizing Sponsor: Brigham Young University

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A WINTER MORNING. GEORGE R. BOSWORTH. best should dry in four hours or less, which it will do in awarmed room, especially in the winter time. The sensitizedtissue will keep for several days if protected from the air.The easiest way to do this is to keep it under pressure in aprinting frame in which you have put some black paper toprotect it from the light. The paper is printed about the same length of time that itwould take to print a light solio proof from the same negative,one that will just show the detail wanted in the high lights.Note how long this takes and print the carbon the same time.In printing be sure that the edges of the negative are allcovered by the rebates of the frame, or else by black paper. 298
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PORTRAIT. Helmar Lerski. This white margin forms a safe edge that protects the printfrom frilling when transferred. While the tissue is printing,or before if desired, some of the transfer paper can be put tosoak in some luke warm water for a few minutes, ready totransfer the picture on to it. To make the transfer place theprinted piece of tissue in a tray of cold water until it flattensout and just begins to curl back with the coated side out, thenput a piece of the wetted transfer paper under it in the sametray, bringing them, together under water so as to exclude air

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Work Type: photographs

Date: 1946

Location: Subject: Palestine

Topics: photographers; portraits

Nationality/Culture: Hebrew

Materials/Techniques: Negative (photographic)

Digital image from scan of negative

Note: General: Images acquired from the income of The Rudolph and Sara Wyner Judaica Book Fund in the Harvard College Library (Fund 560357). Copyright: Central Zionist Archives, cza@wzo.org.il Repository: Judaica Division, Widener Library JPCDPZA39398

Identifier: americanannualof1917newy (find matches)
Title: The American annual of photography
Year: 1917 (1910s)
Authors:
Subjects: Photography
Publisher: New York : Tennant and Ward
Contributing Library: Harold B. Lee Library
Digitizing Sponsor: Brigham Young University

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PORTRAIT. HELMAR LERSKI. 241 I also find this an excellent developer for lantern slides, andwhere a plate is inclined to show fog I find it keeps the plateclear. It is a slow working developer, the proper time for goodsnappy prints being about one and a half to two minutes. Forsepias it is excellent.Here is the formula. Stock.Water 40 oz. Dry Sulphite 6 oz. Citric Acid 120 gr. Iron Sulphite i oz. Bromide Potash 4 drachms For use.Water 10 oz. Stock 2^ oz. Amidol 30 grains The developer does not deteriorate very rapidly, hence will go as far as metol-quinol.

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