BIS CERTIFICATION FOR FLAT TRANSPARENT SHEET GLASS
IS 2835:1987

Sheet glass is a transparent, flat glass with a glossy, fire-finished surface that appears plane and smooth but has a characteristic waviness.

According to IS 2835:1987, sheet glass shall be classified into four qualities:

1. AA Quality or Special Selected Quality (SSQ) – Intended for use where superior quality safety glass, high-quality mirrors, photographic plates, projection slides, etc., are required.
2. A Quality or Selected Quality (SQ) – Intended for specific glazing, mirror manufacturing, safety glass, and so on.
3. B Quality or Ordinary Quality (OQ) – Intended for use in glazing and framing.
4. C Qualify or Greenhouse Quality (GQ) – Intended for use in greenhouse glazing, manufacturing of frosted glass, flooring strips, and other applications.

Sheet glass must be flat, transparent, and clear. When viewed from the edge, it may have a light tint. It should be free from cracks. The nominal thickness, thickness range, and dimensional tolerance on cut sizes (length and width) of sheet glass must be as specified in the standard.

TESTS

The following test shall be carried out for the glass sheet.

• Dimension
• Bow
• Thickness
• Scratches, Rubs and Crush
• Reams, strings, and lines
• Waviness test

A laboratory shall be adequately maintained, in which the various tests shall be carried out according to the methods specified in the standard. A separate sample must be tested for each quality.

Packaging and marking shall be done in accordance with the standard. Sheet glass packages must be labelled with the name and quality of the material, the nominal thickness, the name of the manufacturer or trademark, and a code or serial number in accordance with the standard. A standard mark (ISI Mark) may also be applied to the packaging. According to IS 2835, each package must be legibly marked with the required information. The Manufacturer must obtain a BIS license from the Bureau of Indian Standards to use a standard mark (ISI Mark). The BIS grants a license based on a successful assessment of manufacturing infrastructure, quality control and testing capabilities, and production process.

NOTE:

For Detailed Information about the Procedure for BIS ISI Certification

Conclusion:

If a product falls under the scope of the BIS Conformity Assessment Scheme, All the manufacturers, importers, and foreign entities must obtain BIS ISI Certification. The Bureau may cancel the License if the product fails to meet certification requirements.

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