References in periodicals archive ?
The printer uses heat to activate and colourise the crystals.
They are especially designed to colourise thermoplastic materials such as PET, polycarbonate (PC), polystyrene, polymethyl methacrylate or acrylonitrile-butadiene styrene.
Tom, who worked with the Army and museums on the project, said: "I decided to colourise these images as a tribute to the men pictured.