| 摘要 |
A method of forming a multi-colour image, wherein colour separation images are generated in a first, second, and possibly subsequent colours, which colour separation images are formed by the use of coloured toner powder, the colour separation images are transferred, in successive image-transfer steps under the influence of pressure, to an elastically deformable adhesive intermediate medium provided with a top layer, and are collected thereon to form a multi-colour image, whereafter the multicolour powder image is softened and transferred under the influence of pressure to a receiving support, wherein between two consecutive image transfer steps the powder image consisting of one or more colour separation images is so deformed on the intermediate medium, under the influence of heat and/or pressure, that the powder image becomes adhesive for toner powder, so that a subsequent colour separation image can be transferred not only to the intermediate medium but also to the powder image already present, wherein the intermediate medium comprises a heat-insulating layer of which the product of the thermal conductivity coefficient lambda in J/m sK, the density rho in kg/m<3> and the specific heat Cp in J/kg K has a value less than 2.10<5>. <IMAGE> |
