Lacquered-glass wardrobe shutters in a Bellandur kids' room: scratch resistance, edge-banding and the handover checklist

A three-bedroom flat in Bellandur, handed over last monsoon: the kids' room had twin wardrobes, shutters in lacquered glass—one in mint, the other in blush. By December the architect called: the mint shutter showed a white edge where the child had knocked a toy truck into the corner. The blush shutter was fine. The difference was edge-banding. Lacquered glass is reverse-painted glass—colour applied to the back surface, viewed through the front—and every exposed edge is a moisture entry point. In Bangalore's June-to-September humidity, an unsealed edge delaminates the paint layer within a season. This is the maintenance brief we walk architects through before handover: what lacquered glass is, how it fails, and the checklist that keeps a shutter intact through a decade of use.

What lacquered glass is—and what it is not

Lacquered glass is float glass with an industrial paint system applied to the back face, then cured at temperature. The colour sits behind the glass; you look through 4mm or 5mm of clear glass to see it. It is not a laminate, not a film, not a PVB interlayer. The paint adheres to glass through a primer coat and a bake cycle, typically 60-80°C for twenty minutes, depending on the line. Once cured, the face is scratch-proof in the way glass always is—harder than timber, harder than acrylic, harder than any polymer laminate.

The vulnerability is the edge. Paint does not wrap around the arris; it stops at the cut line. If you specify a lacquered shutter with a raw polished edge and no seal, moisture wicks in through the glass-paint interface. Bangalore's monsoon relative humidity runs 70-85 per cent from June through September; condensation forms on any surface below dew point, and an exposed edge begins to show white bloom—delamination of the paint from the glass substrate—within eight to twelve weeks of installation. This is not a defect in the paint; it is a detailing failure.

Edge-banding: aluminium, acrylic and the tolerance question

Edge-banding is the fix. We use three systems, chosen by the architect based on shutter height, frame profile and whether the wardrobe is floor-to-ceiling or sits on a plinth.

Aluminium U-channel

The most common solution for shutters over 2100mm tall. A 1.2mm aluminium U-channel, powder-coated to match or contrast the lacquer colour, slips over the shutter edge. The channel is cut to the exact edge length—tolerance ±0.5mm—mitred at corners, and bonded with a two-part structural adhesive. The channel seals the paint edge and provides impact protection. In a kids' room we specify this by default: a toy, a chair leg, a cricket bat—all hit the aluminium, not the glass arris.

The joint line at the mitre is visible, typically 0.3-0.5mm. Some architects object to this on aesthetic grounds. We show them the alternative: a delaminated edge within one monsoon. The mitre line is a craft signature, not a flaw.

Acrylic edge-band

For shutters in our Emerald Feather pattern or other high-colour designs, where the architect wants the edge to read as part of the lacquer field, we use a co-extruded acrylic edge-band. This is a 3mm acrylic strip, colour-matched to the lacquer, bonded along the edge with UV-cure adhesive. The bond line is near-invisible under room light—less than 0.2mm if the edge prep is right. The acrylic is softer than aluminium, so impact resistance is lower, but the visual continuity is total. We spec this in adult bedrooms, dressing rooms, any space where the shutter will not see heavy use.

Polished edge with silicone seal

Rare, and only where the architect insists on a clean glass edge—no visible band. We polish the edge to a C-pencil profile, then run a bead of neutral-cure silicone along the glass-paint junction, inside the frame rebate where it will not be seen. The silicone seals the edge but does not protect against impact. This works in a walk-in wardrobe with inset handles, where the shutter edge is recessed 12-15mm into the frame and cannot be struck. We do not recommend it for hinged shutters or any application where the edge is proud.

Scratch-test protocol and what the surface will take

Clients ask: will the shutter scratch? The answer depends on what you mean by scratch. The glass face will not scratch under normal use—keys, coins, a child's fingernail, even a steel ruler drawn across the surface leaves no mark. Glass is Mohs hardness 5.5-6; you need a carbide or diamond point to score it. The lacquer, being behind the glass, is protected by that same hardness.

What will mark the surface: abrasive cleaners, steel wool, scouring pads, anything with embedded silica or alumina. We have seen shutters in a JP Nagar villa where the housekeeper used a green Scotch-Brite pad and a cream cleanser to "polish" the glass. The result was a field of micro-scratches, visible under raking light, that could not be buffed out. The glass itself was not scratched—the damage was to the anti-reflective coating some float glass carries, or to residue left on the surface. But the visual effect was the same.

The scratch-test protocol we run before handover: we draw a steel coin across a 100mm square of the shutter at 45° to the edge, moderate pressure, ten passes. No mark should appear. We then press a carbide scribe to the surface—this will scratch glass, and it does. We show the architect both results and note them in the handover file. The message: normal use will not damage the surface; deliberate abuse will. This is glass, not a miracle.

The care card and what we tell the end client

Every lacquered-glass wardrobe we fit in Bangalore goes out with a printed care card, A5 format, laminated. The card lives in the handover folder the architect gives the client. It contains six points, written in plain language:

• Clean with a damp microfibre cloth only. No sprays, no alcohol, no ammonia, no abrasive creams. Water and a soft cloth will remove fingerprints, dust, and kitchen grease. For stubborn marks, a drop of pH-neutral dish soap in a bowl of water.
• Dry immediately after cleaning. Bangalore's Cauvery water has a TDS of 200-300 ppm; if you let it air-dry on glass you will see white mineral deposits within a week. Wipe dry with a separate dry microfibre cloth.
• Do not use glass cleaner. Most glass cleaners contain ammonia or alcohol, which can soften the paint-glass bond at the edge if they seep in. The front of the glass does not need chemical cleaning; water is enough.
• Check the edge-banding annually. Look for any gap between the aluminium channel and the glass, or any white bloom at the edge. If you see either, call the architect or the atelier. A gap means the adhesive has failed; a bloom means moisture has entered. Both are repairable if caught early.
• Avoid impact to the edges and corners. The edge-band will take a knock, but a direct blow to a corner—where two mitres meet—can dislodge the channel. If a corner is struck, inspect it. If the channel is loose, tape it in place and call for a re-bond.
• Do not drill, screw, or adhesive-mount anything to the shutter. Lacquered glass is toughened after painting, so you cannot drill it. Any attempt will shatter the panel. If you need to mount a hook or a mirror, use a frame-mounted solution.

The card also carries a photograph of the installed shutter, the commissioning date, and the atelier contact. We have found that a physical card, handed over in the folder, gets read and kept. A PDF emailed to the client does not.

Handover checklist: what the architect signs off on

Before we leave site, the architect or site supervisor walks through a checklist with us. This is not a courtesy; it is a contractual step. The checklist has nine points, each initialled:

1. Shutter dimensions match the shop drawing. We measure on-site with a tape and compare to the approved drawing. Tolerance is +0mm / -2mm on height and width.
2. Lacquer colour matches the approved sample. We bring the sample to site and hold it next to the installed shutter under room light and under daylight from the window. Lacquer batches can shift ±ΔE 2.0; anything beyond that is a reject.
3. Edge-banding is continuous with no gaps. We run a fingernail along every edge. Any gap that catches the nail is noted and re-bonded before sign-off.
4. Mitres are tight and aligned. We check each corner with a steel rule. A mitre gap over 0.5mm is re-cut.
5. Shutter sits plumb in the frame. We use a 600mm spirit level on all four edges. Out-of-plumb over 1mm per metre means the frame is twisted; we shim or re-hang.
6. Handle fixings are secure and aligned. We torque-check every screw and verify that handles are level across multiple shutters.
7. No paint spatter, adhesive smear, or install debris on the glass. We clean the surface with IPA and microfibre before handover. Any residue we cannot remove is noted.
8. Care card and sample piece provided. The care card goes in the handover folder; a 100mm × 100mm offcut of the same lacquered glass, with edge-band, goes in a labelled envelope for future colour-matching or repair.
9. Client briefed on maintenance. We ask the architect to confirm that the end client or the client's facility manager has been walked through the care card, either by the architect or by us.

The checklist is photographed and filed. If a warranty claim arises—edge delamination, colour shift, a cracked panel—we pull the checklist first. Most claims trace to a handover step that was skipped.

When lacquered glass is the wrong spec

Lacquered glass is not appropriate for every wardrobe. We decline to quote it in three situations. First: any wardrobe in a room with no controlled ventilation and high moisture load—a bedroom with an attached bathroom that has no exhaust fan, or a servant's quarter with a kitchenette. Persistent high humidity will attack the edge-band adhesive, and we cannot warranty that. Second: any wardrobe where the client has specified a frameless shutter—no rebate, no frame, just glass on concealed hinges. The edge is fully exposed; even with aluminium banding, the risk of delamination is too high. Third: any application where the shutter will be cleaned by a facilities team not trained on the care protocol—a guest bedroom in a villa with rotating housekeeping staff. We have seen too many shutters damaged by well-meaning staff using the wrong cleaner.

In those cases we recommend back-painted toughened glass with a full-perimeter aluminium frame, or a digitally printed glass like our Botanical Harmony pattern, where the image is a ceramic frit fired into the glass surface and the edge is sealed by the frit itself. Both are more expensive than lacquered glass, but the maintenance liability is lower.

Questions we get asked

Can lacquered glass be used for a floor-to-ceiling wardrobe in a Whitefield villa?

Yes, with two provisions. First, the shutter height must not exceed 2800mm; beyond that, toughened glass at 5mm thickness will deflect under its own weight and the frame will need to be over-engineered. Second, the edge-banding must be aluminium U-channel, not acrylic, because a 2800mm shutter will see more frame flex and the acrylic bond may fail. We have fitted lacquered shutters at that height in three Whitefield projects; all are still in service after four years.

What happens if the edge-band comes loose after handover?

If the edge-band debonds within the first twelve months, we re-bond it at no charge—that is a materials or application failure. If it debonds after twelve months, we inspect to determine cause. If the cause is impact damage or exposure to water (a leaking window sill, a planter placed against the wardrobe), the re-bond is chargeable. If the cause is adhesive fatigue with no external factor, we re-bond at cost. The distinction matters, and we document it with photographs.

Can you colour-match a lacquer to a specific RAL or Pantone reference?

We can get close—within ΔE 3.0—but not exact. Lacquer is applied to the back of glass and viewed through the glass thickness, so the colour shifts slightly cooler and darker than the same paint on an opaque substrate. We always make a 300mm × 300mm sample and bring it to site for approval under the actual room lighting before we cut the full shutter. If the architect needs a precise match to a fabric or a wall finish, we recommend they specify our Golden Geometry pattern or another digitally printed design, where colour control is tighter.

How do you handle a scratch that does occur on the glass face?

If the scratch is in the glass itself—a deep score visible under raking light—it cannot be polished out without distorting the surface. The only fix is to replace the panel. If the scratch is in surface residue or a coating, we can sometimes buff it out with cerium oxide compound, but that requires removing the shutter and working it on a polishing table. We do not attempt field repairs for scratches; the risk of making it worse is too high. This is why the care card is explicit about abrasive cleaners.

What is the lead time for a lacquered-glass wardrobe in Koramangala?

From approved shop drawing to site installation: sixteen working days. That breaks down as three days for glass cutting and edge-polishing, two days for lacquer application and cure, one day for edge-banding, two days for toughening and cool-down, and eight days for frame fabrication and pre-assembly at the workshop. We then deliver and install in one day. If the project is in Koramangala or any central Bangalore location, we can sometimes compress the schedule by two days if the frame is a standard profile we hold in stock.

If you are specifying lacquered glass for a Bangalore residential project and want to walk through edge-detailing options or review the handover checklist in detail, the atelier is open for consultations Tuesday through Saturday, 10:00 to 17:00, at our Bangalore workshop. Bring your RCP and elevations; we will talk through what works.