Curved glass is produced by heating a flat pane until it slumps onto a shaped mould, then either toughening it in the same cycle or laminating two bent panes together. The radius, the thickness and whether the curve runs with or across the pane all decide what is achievable, so the geometry needs settling early.
Capability
What can be produced
The pane is heated to its softening point, formed over a mould and quenched in the same cycle, giving a curved panel with full toughened safety performance. All cutting, drilling and edge work happens before bending, because none of it is possible afterwards.
Two bent panes are laminated together over an interlayer. This is the specification for balustrades and overhead glazing, where fragment retention matters, and for acoustic and security applications on a curve.
Where the radius is very large and the structure can hold the pane in tension, flat glass can be cold bent into a frame on site. It avoids the cost of a mould but imposes permanent stress on the glass and the system, and it needs engineering sign-off rather than a rule of thumb.
The achievable minimum radius tightens as thickness falls and loosens as it rises, and every mould carries a tolerance that accumulates across a run of panels. Where curved panes meet in a continuous sweep, the setting-out has to allow for it.
Applications
Where curved glass is used
Curved corners, drum entrances and sweeping elevations where a faceted approximation in flat glass would read as a compromise.
Panoramic lift cars and curved balustrades to atrium voids, both of which are safety-critical positions calling for laminated construction.
Locomotive and bus windscreens, and marine wheelhouse glazing, where the curve is driven by aerodynamics and sightlines rather than appearance.
Curved shopfronts, display cases and counters, where a bent pane removes the vertical joint that would otherwise interrupt a display.
The TPRS product
TPRS Archsafe
TPRS Archsafe combines structural performance with sculptural beauty, offering curved glass solutions engineered for wind load resistance, thermal efficiency, and modern design integration. Ideal for complex applications such as windshields, facades, and chimneys, Archsafe glass is crafted to endure environmental stress while maintaining clarity and contour. With precision-bent technology and safety-laminated formats, Archsafe redefines what glass can achieve by supporting freedom without compromising strength.
Sectors
Where TPRS supplies this
Glass Insights
FAQs
Bent or curved glass is flat glass that has been heated until it softens and formed over a mould to a specified radius. It can then be toughened in the same cycle or laminated with a second bent pane. It is made to the drawing rather than cut from stock, so the radius, arc length and thickness all need to be specified together.
The minimum radius depends on the glass thickness and the bending method — thinner glass takes a tighter curve, and laminated construction is more restrictive than single toughened. Send the radius, arc length, height and thickness together and TPRS will confirm whether it is achievable in one piece.
Yes. In hot bending the forming and the toughening happen in the same furnace cycle, so the panel comes out both curved and fully toughened. This is the standard specification for curved glazing in a safety-critical position.
Hot bending forms the glass permanently in a furnace, so the pane holds its own shape and carries no residual stress from the frame. Cold bending pulls flat glass into a curved frame on site, which is cheaper but leaves the glass and the fixings permanently stressed, and it only works at large radii with engineering approval.
Yes, but both panes must be bent to matching radii and the spacer must follow the curve, so tolerances are tighter than on a flat unit. Confirm the make-up and the radius together at the design stage.
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Enquiries
Send the drawing, get a specification
Panel sizes, thickness, make-up and quantity are all TPRS needs to quote. Processing runs from two plants in Puducherry and Dharwad, with offices in Chennai and Bangalore.