| 摘要 |
An apparatus for security printing of a document on a substrate, having a first and second side, comprising : i) means for feeding variable data in a predetermined digital format to printing stations, ii) at least two printing stations, for image-wise depositing, in accordance to the predetermined format of the variable data, toner particles on the substrate, iii) means for fusing the toner particles to the substrate, to form a fused toner image, characterised in that a) the apparatus comprises means for introducing security features in the document and b) the means for fusing the toner particles to the substrate comprise means for heating and melting the toner particles such that between the melting toner particles and the substrate a contact angle of at most 90 DEG is formed and leave at most 25 mg/m<2> of an external releasing agent on the fused toner image. d
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