. Ein Handbuch der elektrostatischen Modi der Anwendung, Therapeutik, Radiographie und Strahlentherapie . ll finden es unbequem, verpflichtet zu sein, an Hand Toning Lösungen sowie Delayfür das Waschen nach Tonung des Bildes haben. Druckrahmen können in den verschiedenen Größen beschafft werden.Sie bestehen aus einem Holzrahmen mit einer Glasfront, der mit einem beweglichen Rücken und einer Feder ausgestattet ist, um ihn in Position zu halten. (Siehe Abb. 21.) Die Skagraphic Platte wird mit der Folie nach außen und 202 STATISCHE ELEKTRIZITÄT. Das Druckpapier wird über sie in der Rückseite und thentightly geschlossen, um das Papier in apposit
1972 x 1267 px | 33,4 x 21,5 cm | 13,1 x 8,4 inches | 150dpi
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Dieses Bild kann kleinere Mängel aufweisen, da es sich um ein historisches Bild oder ein Reportagebild handel
. A manual of electro-static modes of application, therapeutics, radiography, and radiotherapy . ll find it inconvenient tobe obliged to have at hand toning solutions as well as delayfor washing after toning the picture. Printing frames may be procured in the various sizes.They consist of a wooden frame having a glass front, and pro-vided with a movable back and a spring for holding it in posi-tion. (See Fig. 21.) The skiagraphic plate is placed with the film outward and 202 STATIC ELECTRICITY. the printing paper is placed over it in the back and thentightly closed to hold the paper in apposition during the print-ing process. The exposure is then made either in direct sun-light, subdued light, or the light of an electric lamp, accordingto the character and sensitiveness of the paper employed. Developing.—After the exposure has been made, somepaper, as bromide, requires developing. Place it in a develop-ing solution and develop the same as the sensitized plate. Fixing will also be necessary and various formulas will beemployed according to the requirements of each special paper, . Fig. 21. — Printing Frame. directions for which will be furnished by the manufacturer.Some experience will be .required in order to carry out thisprocess in the most rapid and successful manner, but by fol-lowing the directions furnished with the particular paper whichis adapted for use, it will not generally be difficult. It is best always to employ the same plates, papers, and de-velopers with which the operator will soon become familiar. Stereoscopic radiography constitutes a method for show-ing a superposition of images from two skiagraphs of variousplanes and the distances which separate them. It is accom-plished by taking two skiagraphs at different angles of ex-posure, substantially as follows: The object is placed in posi-tion upon the table before making the first skiagraph. Atube-holder provided with a means for marking by a gauge theexact relative position of the tube to the o
