Drawing Techniques: a Guide
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Dry Media: Fixative  
This liquid is brushed or sprayed over drawings in dry media, especially charcoal or chalk, which are easily rubbed or erased. While it is common today, when even charcoal drawings are sometimes made for exhibition, it was less so in the past. Nonetheless, drawings treated with fixative are found as early as the sixteenth century.

 

 
   
   
Stump
Liquid Media