IS 2835 : 1987
Flat Transparent Sheet Glass.
1. Summary about Flat Transparent Sheet Glass
Flat Transparent Sheet Glass is a basic form of flat glass manufactured by melting raw materials such as silica sand, soda ash, and limestone at high temperatures and forming them into uniform, transparent sheets. It is widely used in windows, doors, partitions, furniture, display panels, and various architectural and industrial applications. The product is valued for its clarity, smooth surface, and dimensional uniformity, making it a foundational material in the construction and fabrication ecosystem.
2. Why BIS Certificate is Mandatory for Flat Transparent Sheet Glass
The BIS Certificate is mandatory for Flat Transparent Sheet Glass because it is a safety- and quality-critical material used extensively in buildings and public infrastructure. Substandard glass can pose serious risks, including breakage, poor optical quality, and inadequate strength.
To protect consumers and enforce minimum quality benchmarks, the Government of India has brought Flat Transparent Sheet Glass under compulsory certification as per applicable Indian Standards. This requirement ensures that only products meeting prescribed physical, optical, and mechanical parameters are manufactured, imported, or sold in the Indian market.
3. What is BIS Certified for Flat Transparent Sheet Glass
BIS certification for Flat Transparent Sheet Glass confirms that the product complies with the relevant Indian Standard issued by the :contentReference[oaicite:0]{index=0}. The certification process includes:
- Product testing in BIS-recognized laboratories
- Factory inspection and evaluation of manufacturing controls
- Continuous surveillance to ensure ongoing compliance
After certification, the manufacturer is authorized to use the BIS Standard Mark (ISI Mark), signaling conformity with Indian quality and safety norms.
Tests required for Flat Transparent Sheet Glass
| Title | Mandatory/Optional |
|---|---|
| Material | Required |
| Cracks | Required |
| Dimension | Required |
| Distribution of Allowable Defects | Required |
| Allowable Cluster of Defects | Required |
| Thickness | Required |
| Scratches Rubs and Crush | Required |
| Bow | Required |
| Reams, Strings and Lines | Optional |
| Waviness | Optional |
4. Benefits of BIS Certification for Flat Transparent Sheet Glass
BIS certification offers clear commercial and regulatory advantages:
- Guaranteed compliance with national quality and safety standards
- Mandatory legal clearance for sale and import in India
- Higher trust among consumers, builders, and infrastructure developers
- Eligibility for government tenders and large construction projects
- Stronger brand credibility and reduced risk of regulatory action