Some old graphite portraits

Hello everyone, These are some of my old graohite portraits I drew last 2015 when I was studying for engineering licensure exam. Drawing is one of my past time especially when my mind is full of formulas and things I need to remember and analyze. It helped me cope with boredom big time.

https://steemitimages.com/640x0/https://ipfs.busy.org/ipfs/QmSqRRaRuPaAodciW542oFRXD8Gn8jq1EwX9q9F4BznR34

This entry is a part of a daily challenge I set for my self :) You can read more about it at this link