Smoke odors can normally be classified into three categories. These categories also need customized deodorization to restore them: Protein odors-These are produced from burned meat, flesh and poultry. This residue is identifiable by a brown or yellowish color and has a greasy texture. Odor removal and deodorization usually entails a complete cleaning of the affected surfaces. Natural Substance Odors-Natural burned materials usually include paper, wood, jute, cork, feathers and wool and anything that has a plant or animal hair source. Identification is made through a gray/black residue that has a dry, powdery consistency. Synthetic Odor Substances-Synthetic (man-made) burned substances encompass burned plastics and textiles. Residues from these substances are black in color and smudge easily since they come from petroleum-based sources. Burned synthetic residue can create smoke webs visible where walls and corners meet the ceiling and where streamers handing from curtain rods. These smoke webs are called smoke tags. NOTE: Soot tags are often misidentified as “spider webs” which supposedly become visible because of the smoke/soot residue.