A process for manufacturing a dental restoration part as well as a dental furnace are provided in which the dental restoration part is produced on a foundation by means of applying at least two layers, wherein initial data, in particular three-dimensional data of the foundation, are stored in a memory device, and picture data, in particular three-dimensional data concerning the outer contour of the dental restoration part to be produced and the layers of the dental restoration part to be applied, are determined and in particular stored. It is provided that the dental restoration part is positioned at least partially during its production within the picture recording area of a picture recording device (30), and that before finishing the dental restoration part (20) and upon the application of at least one layer, the latter is recorded at least with regards to the thickness of the layer and/or its color, is displayed in particular via a display device (16). Furthermore, the layer recorded is compared with the picture data (32) at least regarding the thickness of the layer. An error signal is produced if the layer applied does not correspond to the predetermined layer in accordance with the picture data (32) regarding the thickness of the layer and/or the color and/or the other parameters.