Perhaps in the future, they may also be made with a finer screen. Film is made for light or dark background.

2. A modification of the transparent film is also available in the form of illustration

board, which when treated with a chemical solution brings out the shadings in the desired sections. A screen as fine as 80-line may be secured in this form. This may be secured from The Craftint Manufacturing Company, Cleveland, Ohio.

3. Other companies from which a similar film may be obtained are as follows:

Arthur Brown flk Bros.. New York City. (Artist Improved Shading Sheet.) Grafa-Tone Co.. New York City. Zip-A-Tone , Chicago, Ulinois.

GRAPHIC PRESENTATION

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Courteiy of Ch;ii; Company, Philadelphia.

A. Drawing Boards for Securing Halftone Effects.

1. These drawing boards and many others may be used to secure halftone effects. Before

a pencil is applied to the board, it is perfectly white with slight indentations on the surface. The pencil touches only the high spots, and the effect desired is thus secured.

2. A charcoal drawing on rough paper also secures a halftone effect.

3. Whenever any drawing material which may smudge is used, spray of liquid "fixative"

will prevent any possibility of smudging.

No. 523.-- 9I4X 14J4.

No. 509. -- 9^4 X i4'4.

No. 526.-- 9 J4 X 14^4.

No. 512.-- 7 X 7.

Xo. 5iS.--bHx7'/2

No. 527.-- 9I4 X 14I4.

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.