|Leonardo da Vinci used a sharpened feather|
or stick dipped in pigment for
Now pens and markers come in so many shapes and sizes.
Create your value scales using:
hatching - parallel lines
cross hatching-lines that cross in different directions.
stippling - a series of closely spaced dots
Draw 3 circles practice using those techniques turn your circles into spheres. Don't forget to establish your light source!
Stippling takes the longest but is very relaxing.
Bring out "Miss Pear"
Each day she becomes more lovely. Or you can bring out any simple object to draw using one of the techniques. I recommend starting with cross hatching because it's the easiest method to create a variety of values. And if you get a little sloppy it gives your subject a character.
Set your object on a sheet of white paper and place a light source next to it. This will give you some dramatic shadows. Lightly sketch the shape of the object on your paper. Don't get to fussy, just the basic shape. Then start adding your value and keep layering until you're satisfied. Try it with all 3 techniques. You can even mix techniques. Like I said before with stippling it'll take a while so you'd better put a movie on while you fill in the dots!