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Screentone is a technique for applyingtextures andshades todrawings, used as an alternative tohatching. In the conventional process, patterns are transferred topaper from preprinted sheets.[1] It is also known by the common brand names Zip-A-Tone (1937, now defunct[2]), Chart-Pak (1949[3]), and Letratone (1966, fromLetraset[4]).
Adry transfer screentone sheet, sometimes informally known as a "tone", consists of a flexible transparent backing, the printed texture, and awaxadhesive layer. The sheet is applied to the paper, adhesive down, and rubbed with a stylus (also called aburnishing tool) on the backing side. The backing is then peeled off, leaving theink adhered to the paper where pressure was applied.