A sketch in blue Biro, made of a single line with 3000 corners. It took roughly 10 hours to plot, although there were several other attempts using other pens until I found the best one for the job.
This was drawn using a blue Bic fine Biro, which puts down just the right amount of ink and isn’t blotchy.
For other examples of this technique, see Two-tone Ali and Chest 1.
Materials: Bic Biro on paper
Equipment used: Pen plotter; Raspberry Pi single board computer; Inkscape to control plotter; LibreOffice Calc to organise data
Size: to fit A3
