Colour 3-dimensional printing

A Layered Object Manufacturing, LOM, system configured to assemble a plurality of individual media layers to form a coloured three-dimensional (3D) object, the system comprising:

• a. an inkjet printer configured to colour print at least a portion of a first surface of each of a plurality of media layers, and colour print a corresponding portion of a second surface of the media layer, the second surface being opposite to the first surface, and wherein on each of the plurality of media layers a first image is printed on the first surface and a second image is printed on the second surface, the system being configured such that when the second surface is presented to the printer the first and second images are coincident such that on operably printing the second surface a print-through region in the media layer is provided such that the entire thickness of the print-through region of the media layer comprises ink;
• wherein the first and second images are printed on each of the first and second surfaces with sufficient ink to penetrate approximately half-way through the thickness of the media layer without colour interaction occurring between the first and second images printed on the first and second surfaces of the media layer, and
• b. a collator configured to assemble the plurality of the individual media layers to form the 3D object.