What is Char?

Char meaning in Safety terms is

  1. Carbonaceous material formed by incomplete combustion of an organic material, most commonly wood; remains of burned materials.
  2. In fire simulation, a darkened area within the fire perimeter; usually indicates fire has already passed through; usually created by an opaque material blocking out a selected portion of basic scene illumination. 


reference: Glossary A – Z | National Wildfire Coordinating Group