The implementation of acromatic principles in reproduction and black printer changes

The aim of this research was to determine some non-standard behaviour of creating the separation by applying achromatic UCR and GCR principles. For selected tertiary colour patches various assets of replacements of common achromatic content was exchanged with black, by preserving colorimetric values as much as possible. In the area from visible to 1000 nm differences in response of patches containing various tone values of black are perceived.