Bleach
- Protein fibers (wool, silk) dissolve completely in bleach, foam after a few seconds.
Burn
- Wool - Flame resistant, burnt hair odor, crunchy dark powder ash with soft edge
- Silk - Flame resistant (will catch but will self-extinguish), burnt hair odor, dark powder ash
- Cotton - Burning paper smell, burn fast and bright with after glow, soft grey ash
- Linen - Burning paper smell, burn fast and bright (catches slow) with after glow, soft grey ash
- Polyester, Nylon, Spandex, Acrylic - Melt before catching, if it does catch will burn quickly, strong chemical odor, no ash but leaves a hard plastic crust, may pucker fabric
Rayon - Catches quickly, after glow, paper plus chemical smell, soft grey ash
Acetate - May resemble polyester in symptoms but with a vinegar smell
Source: https://www.youtube.com/watch?v=qtJ5ukWundY, https://www.patreon.com/posts/123845098?pr=true