Courtesy of Ben Day. Inc., New York.

B. Ben Day Shading Films.

1. The Ben Day process is used to make crosshatchings and shadings on charts, maps, and pictures. The shading medium consists of a transparent film stretched taut upon a wood frame. This film bears a design in relief on the outer side. The work is done on the drawing, on the negative, or directly on the plate before it is etched for printing. If done on the negative, the finished plate will show the tint in reverse as to black and white. When a particular shading and the sections in which it is to appear have been decided upon, all other sections are protected by French folio paper, gum, or gamboge (a semi-transparent solution). The inked film upon which the particular pattern appears in relief is then placed face down upon the drawing, negative, or plate. The top side of the shading medium is rubbed with a stylus or rubber roller, and the pattern is thus transferred to the copy.

2. Various shadings are available, as well as textile tints.

3. See 419 and 422 for other methods of securing shadings.

PREPARATION OF ILLUSTRATIONS

Photoengraving and Electrotyping

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