Abstract: A process camera including a lens or lens system movably mounted for focussing light with respect to a glass sheet serving as an image plane and a vacuum-operated frame back provided with a flexible blanket having a surface relief configuration on its contacting surface for holding by contact therewith a photographic material against the said glass sheet, characterized in that the edges of the glass sheet are provided with a material absorbing light to which the glass sheet is transparent.

Abstract: Method of improving the color balance of a multicolor reversal image obtained in a photographic material itself or obtained by a diffusion transfer reversal process in an image receiving material is provided, wherein said method comprises, as illustrated in FIG. 3, the steps of:(1) providing a photographic silver halide material (4) capable of yielding in said material or in an image receiving layer a multicolor reversal image of average gradient of at least 1.8;(2) image-wise exposing said photographic material to or through a multi-color continuous tone original (2) while keeping in the optical path between the original and the photographic material a light-distribution means (3) dividing the light in line-like or dot-like portions over the exposed area of the photographic material,(3) developing and reversal-processing said photographic material, e.g. by dye diffusion transfer-processing, hereby producing a reversal image with average gradient of at most 1.50 and reduced color point spreading.

Abstract: A process for the production of a multicolor reversal image with improved color balance is provided which process comprises the steps of directing incident image light dot- or linewise modulated by a light-distributing means onto a multicolor photographic silver halide emulsion material containing a blue-, a green- and a red-sensitive silver halide emulsion layer and processing said silver halide emulsion layers to form a color reversal image.In the maximum density part of the dots or lines of said light distributing means e.g. a contact screen the ratio of the absorption density for the light corresponding with the spectral sensitivity region of the silver halide emulsion layer being during the exposure most remote from the light-distributing means to the absorption density for the light of the whole visible spectrum (400-700 nm) is higher than the said ratio in any other density part of the dots or lines (see FIG. 1).

Abstract: Disclosed is a xerographic copying apparatus 10, by means of which a variety of copying modes may be realized. So, the apparatus enables the simultaneous production of double sided copies from double sided originals, of double sided copies from two single sided originals, and of single sided copies from double sided originals. The apparatus is so designed that the relative order of the originals as well as of the copies is maintained and that no reversing of the originals is necessary after exposure. The apparatus is so designed that collated sets of copies are obtained, although it may also be set to make multiple copies of one original.