| Dye Class | Fiber Type | Extraction Solution (v/v) |
|---|---|---|
| Acid | Wool, silk, polyamide, protein, polypropylene, polyacrylonitrile | ● Pyridine: water (4:3) |
| Azoic | Cotton, viscose | ● Pyridine: water (4:3 ) |
| Basic | Polyacrylonitrile, modified acrylic polyamide, polyester | ● Formic acid: water (1:1) ● Pyridine: water (4:3) |
| Direct | Cotton, viscose | ● Pyridine: water (4:3) |
| Disperse | Polyacrylonitrile, polyester, acetate, polyamide, polypropylene | ● Pyridine: water (4:3) |
| Metalized | Triacetate Wool, polypropylene | ● Pyridine: water (4:3) ● Aq. oxalic acid (2%) then Pyridine: water (4:3) |
References: Light in Forensic Science Issues and Applications by G. Miolo et.al.