Safety glass must be crafted from 'AA' and 'A' grade flat transparent sheet glass conforming to the specifications of IS 2835:1987. Alternatively, float glass may be employed in the production of safety glass. The thickness of the safety glass should adhere to the standard and be gauged using the prescribed method. Tolerances for the height, width, and corner sections of safety glass must align with the standard requirements.

Safety glazing designated for installation in motor vehicles as per IS 2553 (Part 2) is categorized as follows:

1. Windscreens

• Laminated Glass (II, II/P)

• Glass Plastics

2. Panes

• Uniformly Toughened Glass (with and without marking P)

• Laminated Glass

• Double Glazed Unit (Symmetrical, Asymmetrical)

• Glass Plastics

• Rigid Plastics

• Flexible Plastics

Each classification and sub-classification necessitates separate testing to ensure compliance with the specific type of safety glass. The prescribed tests outlined in the standard must be conducted following the designated procedures within a suitably equipped and staffed laboratory.

TESTS

The subsequent test must be conducted for safety glass for road transport.

• Light Transmittance Test

• Test of Resistance to abrasion

• Resistance to Temperature Changes

• Resistance to fire

• Resistance to chemicals

• Resistance to Radiation

• Resistance to humidity

• Optical Distortion Test

• Head-form test

• Fragmentation test

• Weathering

• Cross-cut

Packaging and labeling must adhere to the guidelines outlined in IS 2553 (Part 2): 2019. Each packet must display the information specified in the standard. The standard mark (ISI Mark) must be affixed to every piece of safety glass, ensuring that it meets all specified requirements. Manufacturers are required to obtain a BIS license from the Bureau of Indian Standards to utilize the standard mark (ISI Mark).

The Bureau of Indian Standards (BIS) issues licenses following a thorough evaluation of manufacturing infrastructure, quality control, testing capabilities, and production processes during an on-site visit to the manufacturing premises.

PROCESS FOR BIS ISI MARK CERTIFICATION