Bas-relief copies
A way of quickly producing relief copies of texts, diagrams and drawings which can be fingertraced by the blind has been developed by Bertil Magnusson of the Swedish Centre for Educational Aids, near Stockholm. A special plastic-coated paper is loaded into a conventional copying machine. Copies are taken in the normal manner, the difference being that the black parts of the copy rise to a height of about one millimetre as they pass under a heat lamp. The coating comprises hollow, microscopic plastic balls, of which those that are black soften and swell under high temperature. If the heat lamp is built into the copying machine, the production of relief copies takes only a few seconds and costs 20c a copy.
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Bibliographic details
Press, 2 May 1984, Page 14
Word Count
123Bas-relief copies Press, 2 May 1984, Page 14
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Acknowledgements
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