"It is cheaper than a PC, a projector and a photocopier," the trainee enthused but, incredibly, could also do colour copies. The name of the mechanism? Banda.
For the benefit of younger readers, a Banda is one of those handpowered copiers of yesteryear that used to get staff high on volatile chemicals as they cranked out worksheets. A bit of research reveals they are still very much with us, courtesy of Unigraph plc of Sheffield (pound;400-pound;800 a pop from www.unigraph.uk.com).
We are assured that dozens of schools are still using the machines - it must be the properties of the ethanol duplicating fluid.