The Belgian ZERO artist Jef Verheyen (1932-1984) became known as the painter of light streams and colour spectra. He experimented not only with light, but also with movement and the invisible as means to evoke natural mechanisms and to reveal universal interrelationships between human beings and the surrounding world. He used geometric principles – his passion for geometry was born out of his interest in mathematics and (Greek) philosophy – as the basis for harmony. Verheyen never gave up on traditional media and materials such as the canvas, paint, and brushes to search for the essence of our nature. 

Jef Verheyen - ARCHIVE

(c) Scan: CKV, 2022 - Jef Verheyen Archive
Annotated study sketch by Jef Verheyen about “diminishing light is increasing darkness”, 1959
Jef Verheyen Archive
Sketch , 2 sides
Ink on paper

toenemend ----------------->
<-------------------afnemend
zelfs de tegenstelling der twee geeft een geheel

[...]

afnemend licht is toenemend donker 
toenemend licht is afnemend donker

References
  • Wend von Kalnein (ed.), Kreislauf der Farben, exh. cat., Kunstmuseum Düsseldorf (28.09.1973 - 11.11.1973), Düsseldorf: Kunstmuseum Düsseldorf, 1973.

  • Jef Verheyen : Retrospectieve / K.J. Geirlandt. - Brussel : Vereniging voor Tentoonstellingen van het Paleis voor Schone Kunsten, 1979. -  : ill. ; 29,5 x 21 cm