IS 9973:1981 is the Indian Standard (BIS) for visors for scooter helmets. This standard specifies the material, optical, mechanical, and constructional requirements for visors intended for use with scooter helmets. It aims to ensure rider safety by providing adequate visibility and protection against impact and weather.
Specification for visors for scooter helmets
| Parameter | IS Value | International | Source |
|---|---|---|---|
| Luminous Transmittance (Clear Visor) | ≥ 85% | ≥ 80% (Class A) | ECE 22.06 |
| Impact Resistance Test Method | 100 g steel ball dropped from 1 m. No cracking or shattering. | 6 mm steel ball at 60 m/s at a specific point. No penetration or shattering. | ECE 22.06 |
| Abrasion Resistance Test Method | Falling sand (1 kg from 1.5 m). Resulting haze shall not exceed 10%. | Taber abraser with 100 cycles. Resulting scattered light is measured. | ECE 22.06 |
| Optical Quality (Refractive Power) | Qualitative: 'No appreciable distortion when viewed through'. | Quantitative: Spherical power ≤ ±0.06 dioptres. | ECE 22.06 |
| Minimum Visor Thickness | Not specified; must pass performance tests. | 2.0 mm (nominal) | BS 4110:1979 |
| Tinted Visor Identification | Marked with 'TINTED - Not for night use'. | Marked with a symbol (e.g., sun) and 'DAYTIME USE ONLY'. | ECE 22.06 |
| Anti-fog Capability | Not specified. | Specific test procedure to measure fogging time/area; must meet minimum requirement. | ECE 22.06 |