The primary difference between color pencils and graphite pencils is how
easily color deceives when rendering tonal values. Color pencils handle the
same as graphite pencils and create the same range of effects. Relatively new
to fine arts rendering, the degree of permanence of color pencils is not
certain. When creating illustrations in color, you have additional concerns
about color compatibility, adjacency, and tonal reproduction. Refer to
chapter 2, Color Theory.
Carbon pencil lead is made of synthetic materials. These leads produce
dense, dull, black lines that are not easily erased. They come in a variety of
degrees of hardness. The softer leads are more versatile than the hard leads
because the softer leads deposit their pigment more easily. Hard leads have a
greater amount of binder, are more brittle, and are less dense in deposit.