| abstract |
Process for the manufacture of a document (1), in which a) in a multiplicity of layers (15, 17, 19) of the document (1) image information is introduced in each case, so that the image information is complemented image to obtain a total image, characterized in that b) the image information is formed from pixels by digital printing at least in a first layer (15) and a second layer (17), in which each of the pixels has one or more image points, c) for the introduction of a characteristic feature for the first layer (15) in the document (1): the image points in the first layer (15) have another characteristic shape and/or size characteristic for the first layer (15) other than in the second layer and/or at least one pixel in the first layer is composed of pixels of a different shape, size, arrangement and/or number than all the pixels in the second layer. |