
This portrait was drawn using red and black Bic Biros. It comprises 266,370 vertical black lines and 127,801 horizontal red lines. Each line is allowed to rotate by up to five degrees from true horizontal or vertical to give it more texture. You can see a close-up below.

The model, Phil, posed remotely from Arizona. He also posed for a typed portrait as part of the same session.
Equipment used: A1 pen plotter; Bic ballpoint pens; Raspberry Pi single board computer; LibreOffice Calc to organise data
Materials: Ball point pens; A1 paper
Size: A1