Particles of incomplete combustion are particulate residues formed when fuel does not burn completely. Their properties vary with the fuel and conditions of the fire.
What this means at your property
After a fire, residue on a smooth appliance may behave differently from residue on unfinished wood or fabric. Describing everything as ordinary dust can overlook the event history and the materials involved.
What should a residue assessment distinguish?
Ask which rooms and surfaces were evaluated, what cleaning approach is proposed and which items need a specialist assessment. Avoid using a successful test on one surface as proof that the same method suits every affected material.