How to simply identify rubber types?

Burning method was used to identify rubber types
The general combustion characteristics are summarized as follows:
1. NR: Appearance; Pale yellow translucent. Combustibility; Yes. Flame characteristics; Black smoke, dark yellow flame, softening. Residual odor; Rubber smell, residue is not sticky.
2. IR: Appearance; Pale yellow translucent. Combustibility; Yes. Flame characteristics; Black smoke, dark yellow flame, softening. Residual odor; Rubber odor residue is non-sticky.
3. BR: Appearance; Pale yellow translucent. Combustibility; Yes. Flame characteristics; Black smoke, dark yellow flame, softening. Residual odor; The residue is non-viscous.
4. SBR: Appearance; Light yellow, or light maroon translucent. Combustibility; Yes. Flame characteristics; Black smoke, dark yellow flame, softening. Residual odor; Styrene odor, slightly swollen, non-sticky
5. NBR: Appearance; Light yellow - light brown, translucent. Combustibility; Yes. Flame characteristics; Black smoke, dark yellow flame, softening. Residual odor; Protein burning odor, non-sticky.
6. IIR: Appearance; Colorless, transparent - translucent. Combustibility; Yes. Flame characteristics; Smoke-free, scattered flame. Residual odor; Melting, sweet odor.
7. EPDM: Appearance; White, opaque. Combustibility; Smoke-free, scattered flame, blue flame. Residual odor; Smell of paraffin.
8. CR: Appearance; Pale yellow - pale brown, opaque. Combustibility; Hard. Flame characteristics; The flame is green. Residue odor; Swelling, smell of hydrochloric acid
9. SR: Appearance; white Translucent - opaque. Combustibility; Moderately flammable; Flame characteristics; White smoke, bright white flame. Residual odor; White gray, less smelly.
10. FKM: Appearance; White, opaque. Combustibility; Extremely difficult. Flame characteristics; Self-extinguishing, flame is green. Residual odor; Soft, poisonous gas.