The process for this started with laying down a rough shape with a cotton ball and black pastel chalk, I then use a cotton bud to refine the shapes before using Staedtler Mars black pencils. (4B,8B)
To finish the drawing I use a Derwent charcoal pencil, and an eraser for any highlights.
A5 size.
Process pics.
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Crypto Tab
Mine Bitcoin from a crome style browser
https://get.cryptobrowser.site/9800483