Physicists say that black is not a colour, but rather a sensation, which occurs when the receptors in our eyes find no colour to register. For occult practices, a black mirror may serve to reveal a hidden side of existence. In alchemy, black stands for an early stage of elementary purification. Kazimir Malevich’s ‘Black Square’ from 1915 marks the beginning of an immaterial art that no longer represented or illustrated anything. ‘Black Mirror’ is in this sense a painterly and mysterious interface, which does not reflect external reality but, rather, our own sensations.