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CARBON PAPER

'B.C.' Before Computers: A selection from our collection, of weird and wonderful machines designed to help hard pressed secretaries and accountants of yore.

One way of making a few copies of a document was to insert sheets of paper covered in carbon or dry ink between sheets of paper before writing or typing. This was often a bit messy; mistakes were difficult to correct, and only two or three copies could be produced at the same time.