The primary arc beads and the secondary arc beads are the important evidence for identification of the cause of fire during airplane electrical fire investigation.

Simulating fire scene, melted marks of copper wires with different diameters caused by fire were made and cooled by water.

Products include: hot melt marking paint, normal temperature reticule coating, a two-component coatings, concussion marking paint, glass beads, coating agent under various road marking paint.