Screentone is a technique for applying textures and shading to , used as an alternative to hatching. In the conventional process, patterns are transferred to paper from preprinted sheets. It is also known by the common brand names Zip-A-Tone (1937, now defunct Zip-A-Tone: Registration Certificate – Manufacturer-supplied first use date), Chart-Pak (1949 Chart-Pak: Registration Certificate – Manufacturer-supplied first use date), and Letratone (1966, from Letraset Letratone: Registration Certificate – Manufacturer-supplied first use date).
A dry transfer screentone sheet, sometimes informally known as a "tone", consists of a flexible transparent backing, the printed texture, and a wax adhesive layer. The sheet is applied to the paper, adhesive down, and rubbed with a stylus (also called a burnishing tool) on the backing side. The backing is then peeled off, leaving the ink adhered to the paper where pressure was applied.
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