| Thermal transfer printers are used to produce colour images
by transferring a wax-based ink onto the paper. They are popular
for printing bar codes, labels and medium-resolution graphics.
Imagesetters produce very high-resolution output (up to
3,540 dpi) on paper or on the actual film for making the printing
plates. In addition, they are extremely fast. Imagesetters are most
often used in desktop publishing (DTP) for high-quality publica-
tions. Although they produce the highest quality output, they have
one important disadvantage: they are too expensive for homes or
small offices.
In modern lithographic printing, images are created on a DTP
computer and then output directly to the printing plates, without
requiring film as an intermediate step. This technology is called
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