The Photo-Miniature Volume 4, Nos. 43-48

The Photo-Miniature Volume 4, Nos. 43-48

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1902 edition. Excerpt: ... light to be turned up or down as required. If housegas is not available an oil-lamp may be used; but in that case a fillet of wood should be screwed to the board, and care taken that the base of the lamp always touches it before commencing work. Parallel lines should be ruled across the bottom of the exposure board at intervals of 6 inches apart, and numbered 6," 12," 18," etc. The apparatus will stand upon a table, and if gas is used the connection is made with a piece of India-rubber tube to the nearest gas bracket. "AA is a drawing-board about 11 inches by 14 inches, supported on a foot-piece, DD, 11 inches by 6 inches, at the edge of which, at FF, two brass plates are screwed to enable the whole to be shifted up and down the board to and from the source of light. CC are made of two fillets of wood nailed together at right angles, and are intended to clutch and hold the printing frame in position at right angles to the light. The upper C is not screwed to the backboard, but slides stiffly in a vertical slot, so as to accommodate printing frames of various sizes." It is obvious that an ordinary gas-jet, electric bulb, or kerosene lamp can be used with this exposure board with advantages over the ordinary method of exposing by holding the printing frame in the hand. Especially when we need to modify the exposure by vignetting or shading, the freedom of both hands is desirable. Where it is available an incandescent Electric Light electric bulb is sometimes preferable, and can be handled as described above. It is a little slower than a Welsbach burner, and so permits of greater control during exposure. A kerosene lamp is used for exposure Kerosene by many, but it is yellow and works slowly, from four or five more

Product details

  • Paperback | 142 pages
  • 189 x 246 x 8mm | 268g
  • United States
  • English
  • black & white illustrations
  • 1236790707
  • 9781236790705