Char

n. A substance or material that has been blackened by fire or reduced to charcoal by incomplete combustion.

 

  • Discussion

 

Char is a general term referring to an object that has been blackened by fire. Char that forms on tree bark is called bark char; char that forms on duff or ground fuel is referred to as ground char. Bark char is measured using bark char classes (see bark char). Ground char is measured using ground char classes (see ground char). These classes are indirect measures of how long the substrate was exposed to heat.