References
- Birkenshaw, J. W. B” The Black Printer, PIRA Report PR 154 (1977).
- Otschik, G., Investigations into Changing the Composition of the Colour Set by Altering Colour Separations for the Black, FOGRA Report 1.203 (1981).
- Johnson, A. J., Optimum Photomechanical Colour Reproduction, PIRA Report PR 170 (1982).
- Yule, J. A. C., “Four colour processes and the black printer”, JOS A, 30, 322 (1940).
- Yule, J. A. C, Principles of Colour Reproduction, Wiley, New York (1967).