Abstract: Herein is described a scratch-off structure comprising the following layers in order: a substrate having a first layer showing information thereon, a second layer comprising a polymeric film and being substantially transparent; a third layer comprising a transparent electrostatic ink; a fourth layer, wherein the fourth layer is coloured. Methods for making scratch-off structures and collections of scratch-off structures are also described.

Abstract: Herein is disclosed a method for electrostatic printing. The method may comprise: a. electrostatically printing a discontinuous layer of a transparent electrostatic ink in a first area on a print substrate; b. electrostatically printing an image comprising a coloured electrostatic ink on the print substrate in a second area, which may or may not be in the same location as the first area, wherein the electrostatic printing in each of steps a and b involves, respectively, transferring the transparent electrostatic ink or the coloured electrostatic ink from a photoimaging plate to the print substrate via an intermediate transfer member. The method may then involve repeating steps a and b on the same or different print substrates, wherein each repeat of step b results in the same or a different printed image, and the discontinuous layer of transparent electrostatic ink varies between at least two different printing patterns. A system is also disclosed herein.