The images in the Colour Grid Series were created using the Sicograph, a device developed in 1973 for medical use and one of the first Sicographs capable of digitally analysing X-ray images, converting them into colour and printing them.

Instead of X-ray images, however, random patterns were fed into the system via punch cards and altered, using image-processing techniques such as smoothing contours, merging points into areas, or reducing colour values. The changes were visible in real time on a monitor.

The output was produced by a precursor to today’s inkjet plotters, which applied liquid ink through nozzles onto paper stretched over a rotating drum, scanning it line by line, with the ink intensity controlled electronically.

The characteristic colour scheme resulted from using only the three primary colours – red, green and blue – without black.

More works
Rotations/Projections (1974)
The Biennale Serigraphs (1954-1969)
Dance of the Electrons (1958/1959-2018)