Dry Media
The dry media consist of natural or synthetic mineral or plant substances that deposit crystalline or splinter-like fragments in the paper fibers. Natural chalks. contained their own binders in the form of clay. Charcoal has none. Artists or manufacturers also sometimes added binders. When stroked against the surface of the paper, they deposit fragments in the upper fibers. Consequently they lend themselves more or less easily to erasure and correction. In this way they provide the draftsman with flexibility in his initial inventions.
 
 Stylus  Fabricated chalks and pastels
 Metalpoint    Combined chalks
   
   Black chalk and white heightening
   
   Black and white chalk
   
   Black and red chalk
  
   Black, red, and white chalk
 Charcoal
      
Oiled charcoal
 Black chalk
 Red chalk
 White chalk  Graphite
 Brown, yellow, blue chalk, etc.  Conté crayon
 Crayon  Stump
 Fixative

by Michael Miller
Information supplied by: http://www.nyu.edu/classes