A copier is a machine that makes paper copies or documents and other visual images rapidly and inexpensively. The use of copy machines will likely become obsolete with the prevalence of digital documentation. Copier supplies include paper, a photoreceptor drum and toner. The photoreceptor drum is the heart of the system. The cylindrical drum rotates so that an image can be built strip by strip. Toner is sometimes knows as dry ink, though it is a pigmented liquid, not ink.
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