What material is used for these visors?

The standard specifies a suitable transparent plastic material, like polycarbonate, that meets all performance tests (Clause 3).

What is the minimum light transmission allowed?

The visor must allow for a light transmission of not less than 85% (Clause 6.2).

How is the impact resistance tested?

It's tested by dropping a 500g steel ball from a height of 1.3m onto the visor, which should not crack or fracture (Clause 5.3).

IS 9995

: 1981

Specification for visors for non-metal police and firemen's helmets

CurrentSpecializedSpecificationFire Safety · Fire Fighting

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This standard specifies the requirements for visors intended for attachment to non-metal helmets worn by police and fire services personnel. It outlines the material, dimensional, optical, and performance characteristics like impact resistance and clarity. The standard's purpose is to ensure the visor provides adequate facial protection without compromising the wearer's vision during duty.

Specification for visors for non-metal police and firemen's helmets

Quick Reference Values

Minimum light transmission85 %

Maximum haze2 %

Minimum thickness2.0 mm

Impact Resistance (Ball Drop)No fracture with 500 g steel ball from 1.3 m height

Refractive Power Tolerance±0.06 dioptres

Practical Notes

This standard is for the visor component only and must be used in conjunction with the relevant helmet standards like IS 2745 or IS 9694.

Optical properties are a critical safety feature; tests for light transmission, haze, and refractive power are non-negotiable for compliance.

Procurement officers should verify the 'ISI Mark' on the product, which certifies that it conforms to the requirements of this standard.