London-based artist Mark Powell has chosen the backs of old envelopes as a canvas for these delicately rendered portraits of the elderly, using nothing more than a standard Bic Biro pen to create the delicate folds and wrinkles of their skin. I love everything about these. See much more of his work here and he sells a number of art prints over on Society6. If you liked this also check out the photography of Lee Jeffries.
Artist and photographer Sarah Esteje illustrates these wonderful portraits of animals using nothing more than a standard Bic pen. You can learn a bit more about the artist over on Beware and click through the drawings above to see some larger versions.