It’s official, spitting is an art (when it’s aimed at paper that is, not the pavement). Actually, it’s a great way to blend colours, especially when using water soluble pens. Which I tend to do more than I should – the result of having kids and a ready supply of felt-tip pens.

I did this sketch while my son was learning his times-tables, which meant I had to draw quickly! I found the result a little scratchy so used my finger, and a small amount of spit, to soften the picture. You might be thinking why not just use water – you know, from a tap. Well, that would require extra effort, and isn’t half as fun!