The incomparable Florent Bonnefoi does another of his great 4-part process posts. We’re learning a lot from him ourselves, so we implore you follow his Tumblr, The Paper Lab. Also, share tips that you’re discovering by tagging your posts “LearningPaper”!
thepaperlab:

Four steps to “The cat” 
Let’s go back to the sketch published last Sunday. Dealing with cat hair appeared to be quite  a pain challenging, but, thank you pencil ! the result is finally acceptable.
The outline was made with the black pencil. It’s easier to mask, next, with watercolors and other pencils, than fountain pen (but, maybe a bit less funny). Don’t spend to much time here, accuracy is not so important at this step, since the main elements of the sketch (eyes and nose, in this case) are globally right aligned.
As with black&white sketches, Paper’s grey tone appeared to be very useful for drawing that damn hair, always with the pencil tool. Grey watercolor was also used on dark hair zones, and reworked with black, and white pencils to depict hair.