Benday dots are what you get when you put your nose right up against a magazine or newspaper photo -- it's a printing process to make all the colors out of the 4-color CMYK spectrum, or create gradients in black-and-white, by converting the variances in color and brightness into an array of dots. Also known as dithering or screening, the benday process was invented in the 19th century and has worked out well since; your inkjet printer probably uses a variant. Roy Lichtenstein loved 'em, and made a name for himself out of exaggerating existing ones. Why "benday"? Well, ask Ben Day -- he's the inventor.
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