Pencil Drawing

These have wax-like cores with pigment and other fillers. Multiple colours are often blended together.
• Grease pencils
They write on virtually any surface (including glass, plastic, metal and photographs). The most commonly found grease pencils are encased in paper (Berol and Sanford Peel-off), but they can also be encased in wood (Staedtler Omnichrom).