Some corrections by Dmitry Shaklanoff-von Seipt

Like this excellent sketch Dmitry .

We'd need to see you, Dmitry, to be sure that you've caught yourself accurately: but you've got a strong drawing there, so it doesn't matter really. At least you've managed a drawing, whereas in this heat I really can't be bothered. I'm not aware of coloured graphite for a clutch pencil, I must investigate this. When I can summon the energy to make a serious drawing, that is - I'm using black and sepia ink at the moment: ink flows well in the hotter weather.

Thank you Robert. I used Koh y noor 2 mm leads, they are available on Amazon, ebay, etc. Staedtler also has 2 mm red and blue leads. I am also planning to experiment with 0.5 mm Kara togu pencil, ordered them on AliExpress, to develop "light touch". The leads' characteristics may differ - erasability, waterproof or not, etc.

Thank you everyone.