: The process originally utilized a series of celluloid screens with raised images (dots, lines, or textures).

The (often spelled Benday ) is a printing and photoengraving technique used to produce tonal effects, shading, and secondary colors through the use of fine patterns—most famously, dots. Developed in 1879 by illustrator and printer Benjamin Henry Day Jr. , it revolutionized commercial printing by providing an inexpensive way to add texture and color to line art in newspapers and comic books. 1. Mechanical Principles

Unlike the , where dots vary in size to create gradients from photographs, Ben Day dots are uniform in size and distribution within a given area.

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