Most pages of text or graphical materials in a library are black‐and‐white and most of the work that a scanner will do involves black‐and‐white images. Yet, it makes sense to buy a scanner capable of processing colour images. The difference in cost between a colour scanner and a black‐and‐white unit is relatively small, and the colour scanner allows colour pages to be converted into computer images whenever needed. In response to the demand by computer users for the ability to handle colour, new models of scanning equipment are almost all equipped to do so.
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