BIS/ISI certified as per IS 2553. Toughened and heat-strengthened glass processed in Bangalore. 25,000 sqm/month tempering. Laminated glass through quality-tested service providers.
Karnataka Metal Company processes BIS/ISI certified safety glass (both toughened glass and laminated glass) at its Nelamangala plant in Bangalore, per IS 2553. For a detailed comparison, read our glass selection guide.
The table below compares the three types of safety glass processed by Karnataka Metal Company.
| Property | Toughened Glass | Laminated Glass | Heat-Strengthened Glass |
|---|---|---|---|
| Indian Standard | IS 2553 (Part 1): 2018 | IS 2553 (Part 1): 2018 | IS 16982 |
| Strength vs Annealed | 4 to 5 times stronger | Depends on pane type (annealed or toughened) | 2 to 3 times stronger |
| Breakage Pattern | Small, blunt granules | Depends on the panes used. Lamination ensures a barrier post breakage and containment of broken glass shards | Large fragments, stays in frame |
| Post-Breakage Barrier | No; panel is lost | Yes; panel remains in place | Partial; fragments are larger and stay together |
| Spontaneous Breakage Risk | Yes (NiS inclusions) | Yes for toughened laminated (most common); no for annealed panes. Failure rates depend on the pane type: testing over a 20-year period shows roughly 1 failure per 4 tonnes for toughened glass, 1 per 80 tonnes for heat strengthened and 1 per 400 tonnes for heat-soaked toughened or heat strengthened. | Risk exists, but it is much lower than toughened glass |
| UV Protection | No (unless coated) | Yes, up to 99% (PVB interlayer) | No (unless coated) |
| Sound Insulation | Standard | Enhanced (STC 35 to 40+ with Acoustic PVB) | Standard |
| BIS/ISI Certification | Mandatory since April 2023 | Mandatory since April 2023 | Governed by IS 16982 |
| KMC Capacity | 25,000 sqm/month | 10,000 sqm/month | 25,000 sqm/month (shared with tempering) |
| Best For | Doors, partitions, facades, shower enclosures | Skylights, balustrades, overhead glazing, security | DGU outer pane, spandrel panels, Low-E applications |
Shatters into small, blunt-edged granules; the panel is lost on breakage. Specified for doors, partitions, and facades where a post-breakage barrier is not required, and the highest strength is required at a lower thickness and weight of glass.
Laminated
Cracks in a spider-web pattern; fragments stay bonded to the PVB or SGP interlayer. Specified for overhead glazing, balustrades, and fall-risk areas.
Breaks into large radial fragments that stay in the frame with lower spontaneous breakage risk than toughened glass. Used where post breakage retention is required and as the inner/outer pane in double glazed units (DGU) and Low-E applications where flatness tolerance can be better maintained.
Karnataka Metal Company processes all three safety glass types at the Nelamangala plant in Bangalore and supplies aluminium framing sections for window and curtain wall systems, so you can source glass and framing from one supplier.
| Requirement | Detail |
|---|---|
| Governing Standard | IS 2553 (Part 1): 2018, Safety Glass |
| Mandatory BIS/ISI Marking | Since April 1, 2023, for all safety glass sold in India |
| ISI Mark Location | Permanent mark etched or printed on glass surface during processing |
| Mark Contents | IS 2553 standard number, processor licence number, BIS logo |
| Test Certificates | Available per batch on request from Karnataka Metal Company |
| Heat-Strengthened Standard | IS 16982 (separate from IS 2553) |
| Human Impact Zones | IS 16231 (Parts 1-4): 2019 classifies 4 risk zones |
IS 16231 (Parts 1-4): 2019 defines four categories of human impact risk zones in buildings. Safety glass (toughened or laminated) carrying the BIS/ISI mark is mandatory in all these areas.
| Zone | Location | Safety Glass Requirement |
|---|---|---|
| Ground-level glazing | Windows and doors within 500mm of floor level | Toughened or laminated |
| Side panels to doors | Glass panels adjacent to doors | Toughened or laminated |
| Balustrades and railings | Balcony barriers, staircase balustrades, terrace barriers | Toughened (12mm+) or toughened laminated |
| Overhead glazing | Skylights, canopies, atrium roofs, roof lights | Laminated glass mandatory |
| Wet areas | Shower enclosures, bathtub screens | Toughened (8 to 10mm) |
| Partitions | Office partitions, cabin dividers, glass walls | Toughened or laminated |
| Process | Capability | Notes |
|---|---|---|
| Tempering | Project-capable tempering furnace, 25,000 sqm/month | 4mm to 19mm thickness range |
| Laminating | Lamination through quality-tested service providers, 10,000 sqm/month | PVB, SGP, and Acoustic PVB interlayers |
| Heat strengthening | Controlled cooling cycle on tempering furnace | 2 to 3x strength, IS 16982 compliant |
| CNC cutting | Italian CNC machines | Precision cuts before tempering |
| Edge finishing | Arrised, flat ground, flat polished, bevelled | Multiple edge polishing and grinding machines |
| Heat soak testing (HST) | On-site heat soak furnace | Nickel sulphide failure rates tested over a 20-year period: toughened glass approx. 1 per 4 tonnes, heat strengthened 1 per 80 tonnes, and heat-soaked toughened or heat strengthened glass 1 per 400 tonnes. |
| Quality testing | GASP, Merlin Lazer, roller wave gauge | Non-destructive stress and optical quality testing |
Safety glass pricing depends on glass type, thickness, coating (Low-E, pyrolytic, and specialty finishes), edge finishing, and order quantity, and moves with market conditions. For project-specific pricing, contact us with your panel schedule and specifications.
NBC 2016 mandates safety glass in any location where people could walk into, fall through, or be injured by broken glass.
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We process toughened glass at our 50,000 sq ft Nelamangala plant and offer laminated glass through quality-tested service providers. Our tempering produces some of the flattest glass in the industry, reducing the risk of bubbles and delamination. One supplier for your entire safety glass requirement, including toughened laminated configurations, reduces procurement complexity and lead times.
Every panel carries a permanent ISI mark as per IS 2553 (Part 1): 2018. As a certified BIS safety glass processor, we provide test certificates for every batch on request.
On-site heat soak furnace reduces spontaneous breakage risk from NiS inclusions in toughened glass. Recommended for all facade and overhead glazing projects.
Equipment includes roller wave gauge, GASP, Merlin Lazer, surface table. Every batch is tested for fragmentation, impact resistance, and optical quality.
Source your safety glass and aluminium sections for window frames, curtain walls, and railings from one supplier. One purchase order, one delivery schedule.
Tempering capacity of 25,000 sqm/month at Nelamangala, with laminated glass offered through quality-tested service providers. One of the largest safety glass operations in South India, handling multi-tower projects and single-panel retail orders.
For safety glass suppliers in Bangalore, visit our retail outlet at A.M Road for immediate stock or contact us for processed safety glass delivered across South India. Our glass team can help with BIS/ISI compliance, toughened vs laminated selection, and project-specific specifications.
