Hold the piece of tinted plastic almost upright and trace the mirror image which seems to appear

Originally known as Camera Lucida this is an old 'scientific novelty' which has been developed in to an easy-to-use device and marketed as a toy. If you hold a piece of tinted glass, or in this case plastic, almost upright beside an image, a mirror image seems to appear beside it. This can then simply be traced to create an extraordinary accurate copy. The A4 sized sturdy plastic case holds and correctly positions the original, the screen and the paper for copying on to.