Polycolor, a professional photo lab in Essen, Germany has developed a unique
CRT based digital enlarger, the Variochromat. This machine is capable of exposing
onto all photographic materials, including traditional fiber-based paper for
black and white prints.
The Variochromat is based on a high resolution cathode ray tube (CRT) which
has a resolution of over 30 mega pixels with an 8-bit grayscale. The Variochromat
software is said to provide optimal tonal reproduction of grayscale digital
images, creating a profile for each size and material. Before actual production
starts, a stepwedge is processed and measured to guarantee consistent reproduction
of tonal values.