Exercices de dessin by Tim Colmant is an ongoing series of drawings by Tim Colmant, in which he uses rules, tools or handicaps to create new aesthetics and ways of drawing, aiming to find meanings in explorations, errors and serendipity. Exercices de dessin 01 is a selection of 250 drawings from 2016 to 2018, only made by using pencils and business cards as rulers.