The Forensic Brush segmentation by application isolates four principal usage clusters that together constitute the total market volume. The largest cluster, DNA/Biological Evidence Collection, accounts for roughly 30 % of revenue, driven by routine crime‑scene swabbing of blood, saliva, and other bodily fluids where brush fiber composition directly influences sample integrity. The second cluster, Fingerprint Recovery, represents about 25 % of the market; this segment relies on fine‑tipped brushes to lift latent prints from porous and non‑porous substrates, with performance metrics tied to brush stiffness and static charge. A comparable 25 % share belongs to Trace Evidence Collection, encompassing fibers, hairs, and particulate matter; here, brush morphology and tip geometry dictate collection efficiency. The remaining 20 % is attributed to Fire Debris and Explosive Residue analysis, where brushes must withstand high temperatures and chemical exposure while preserving trace residues for laboratory confirmation. Collectively, these application segments define demand drivers, investment priorities, and the overall market size for forensic brushes.