Tonal values are so important to make your work stand out, so a bit of planning before you actually paint the picture is really important.
In this video, I show the planning stages before the main piece is ever touched, and I explain my thought process about the different tonal values within the piece as I paint it.

Liquitex Carbon Black Acrylic Ink, 150ml
https://www.amazon.co.uk/Liquitex-Pro...

Pentel brush pen
https://www.amazon.co.uk/Pentel-GFKP3...