English Views: 0 Author: Senior FF&E Procurement Specialist Publish Time: 2026-10-29 Origin: Site
- Thickness decides function: 3 mm is a skin that needs full backing, 6 mm suits door faces on a carrier, 12 mm carries table tops on a frame, and 20 mm holds a polished straight edge without buildup.
- Areal weight runs about 7 kg/m² at 3 mm, 14 kg/m² at 6 mm, 29 kg/m² at 12 mm and 48 kg/m² at 20 mm, which drives every hinge, handler and freight decision downstream.
- A standard 35 mm hinge cup is 11.5–13 mm deep, so it cannot be bored into a 6 mm slab; the hinge goes into a bonded carrier panel, never into the stone.
- Internal cutout corners need a radius of 5 mm or more (8–10 mm preferred), and openings should sit at least 50 mm from the panel edge.
- A 45° miter typically adds 25–40% to edge cost but hides the core; a polished straight edge on 12 mm or 20 mm is the lowest-risk detail for a first program.
- Sintered stone ships vertically on an A-frame; a 3,200 × 1,600 mm 12 mm slab weighs about 147 kg and needs four handlers.
- Taula, the sintered stone line of Hongye Furniture Group, cuts, bonds, miters and crates components in one plant, with 45–60 day lead times to 50+ countries.
Sintered stone stopped being a countertop material once fabricators learned to bond it to a carrier. Most technical questions reaching Taula are no longer about stain resistance. They concern thickness, substrate, hinge position and who carries a 147 kg slab up a stairwell — furniture questions settled in millimeters and kilos, not marketing language.
This guide treats sintered stone as a component: a 3, 6, 12 or 20 mm panel that must be backed, edged, drilled and shipped as part of a table, cabinet door or credenza. It covers the thickness map, three backing systems, hinge arithmetic, the cost of three edge details, cutout geometry and chip repair.
No rule below depends on a slab brand. They come from density, flexural strength and brittleness, and apply to any vitrified porcelain slab.
Thickness decides what a sintered stone panel can do: 3 mm needs a full backing, 6 mm suits cabinet and drawer fronts on a carrier, 12 mm carries table tops with a frame, and 20 mm spans short distances with a polished straight edge and no substrate.
At 3 mm the panel is a decorative skin, calibrated to ±0.2 mm on furniture-grade stock, a tolerance that matters where two panels meet at a visible joint. Weight lands near 7 kg/m² at 2.4 g/cm³. It is bonded to plywood, MDF or aluminum honeycomb and edged with a matching profile or metal trim, because a 3 mm arris cannot be polished into a convincing table edge. This is the cheapest route to a full stone face on a wardrobe front.
At 6 mm, weight doubles to about 14 kg/m² and the panel can be handled without immediate risk of cracking. A 600 × 900 mm door face weighs roughly 7.8 kg, so a finished leaf with a carrier is around 14–16 kg. Six millimeter is the practical minimum for a cabinet door, but only as part of a composite. It also suits drawer fronts, side panels and shelf tops under about 500 mm; longer shelves sag.
At 12 mm, the material becomes structural enough for table tops, credenza tops and reception counters, provided a frame or apron carries it. Weight is about 29 kg/m², so a 1,600 × 900 mm top is roughly 42 kg before the base. Overhang beyond the frame should stay near 150 mm; past that, point-loading at the edge matters. A mitered edge gives a 24 mm visual thickness, which is why most residential dining tables use 12 mm.
At 20 mm, weight reaches about 48 kg/m² and a 1,600 × 900 mm top passes 69 kg. This thickness can be polished straight on the edge without applied buildup and reads as a solid slab. It spans 600–700 mm between rails and takes an overhang near 250 mm, depending on width and load. It costs 60–70% more in material than 12 mm, so it belongs where the edge is the design.
A ±0.3 mm mismatch between slabs shows as a step at a miter joint or a shadow line under raking light, so keep components for one piece from the same batch and calibration run.
Nominal thickness | Areal weight at 2.4 g/cm³ | Structural behavior | Typical furniture use | Backing required |
3 mm | ~7 kg/m² | Decorative skin, no independent stiffness | Wardrobe fronts, door faces, lift panels | Full-surface bond to 16–18 mm board or honeycomb |
6 mm | ~14 kg/m² | Light panel, sensitive to point loads | Cabinet doors, drawer fronts, shelf tops to 500 mm | Carrier panel or aluminum sub-frame |
12 mm | ~29 kg/m² | Self-supporting over short spans | Dining tops, credenza tops, counter fronts | Frame or apron, overhang to ~150 mm |
20 mm | ~48 kg/m² | Handles short spans and polished edges | Reception tops, plinths, premium dining tables | Rails at 600–700 mm, overhang to ~250 mm |
A thin sintered panel has high surface strength but little bending stiffness, so it must be bonded to a substrate that carries the load: aluminum honeycomb where weight matters, plywood where the component meets conventional joinery, glass-fiber backer where the surface is curved or wet.
Bending stiffness rises with the cube of thickness. Going from 3 mm to 6 mm makes a panel eight times stiffer; 3 mm to 12 mm makes it roughly 64 times stiffer. That explains why a 3 mm skin on a 20 mm core can outperform a 6 mm panel in a door, and why a 6 mm panel with unsupported edges fails at loads a 12 mm top ignores.
Aluminum honeycomb is the lightweight option. A 3 mm sintered skin is bonded to a 10–20 mm core, sometimes with a second skin on the back, producing an 18–25 mm panel at 11–16 kg/m². The cells spread point loads across the face better than a solid board of the same weight. The weakness sits at the perimeter: cells crush if a fixing is tightened into an open core, so fabricators insert 20–30 mm deep aluminum or plywood edge blocks wherever a hinge, bracket or connector lands.
Plywood or MDF is the joinery-friendly option. A 16–18 mm moisture-resistant board carries a 3 or 6 mm skin and brings the total to 22–24 mm, matching standard cabinet construction. Weight lands around 20–24 kg/m², heavier than honeycomb but manageable for a 600 mm door. The board takes conventional hinges, dowels and confirmat screws. The risk is moisture: seal the board edges, specify MR glue, and avoid bonding to a board that has not acclimatized to the assembly room.
Glass-fiber backer is the specialist option. A 1–2 mm fiber-reinforced layer bonded to the back of a 3 mm skin adds impact resistance and allows slight curvature, at 9–12 kg/m², but it gains little bending stiffness and still needs a frame.
Flexural strength belongs in the specification. Vitrified slabs are normally tested to the ISO 10545 series (https://www.iso.org/) for ceramic tiles, while dimension-stone testing follows the ASTM C-series (https://www.astm.org/), including C880 for flexural strength. Ask for the test report, not just a data sheet.
The adhesive line is where cheap composites fail. A two-part polyurethane or silane-terminated polymer at 0.5–1.0 mm in full coverage, cured for 24 hours, keeps skin and core acting as one section. Spot bonding leaves voids, and a void becomes a drum, then a crack. Aluminum expands about three times more than sintered stone per degree, so the adhesive must stay flexible. Target flatness after cure is 0.5 mm per meter or better; above 1 mm shows as a rock on a table top.
Backing system | Core thickness | Finished panel weight | Best application | Main risk |
Aluminum honeycomb | 10–20 mm | 11–16 kg/m² | Doors, sliding panels, lightweight tops | Core crush at fixings without edge inserts |
Plywood or MDF | 16–18 mm | 20–24 kg/m² | Casegoods, drawer fronts, table aprons | Moisture movement and edge swelling |
Glass-fiber backer | 1–2 mm | 9–12 kg/m² | Curved fronts, wet zones, exposed backs | Low stiffness, still needs a frame |
Solid 12 mm panel | None | ~29 kg/m² | Tops with a frame, plinth cladding | Chipping at unsupported edges |
Yes, but not as a bare 6 mm slab with a 35 mm hinge cup bored into it: the door needs a carrier panel, edge reinforcement at the hinge line, and hinges whose rated capacity is at least twice the finished leaf weight, which for a 600 × 900 mm door is usually 14–16 kg.
The hinge geometry decides this before aesthetics. A concealed hinge uses a 35 mm cup, 11.5–13 mm deep, set about 22.5 mm from the door edge. Boring that cup into a 6 mm slab leaves nothing behind it and concentrates stress around a brittle hole. A bonded carrier is the usual fix: stone face on a 16–18 mm board, cup bored into the board, screws biting into wood or a metal insert. The alternative is an aluminum sub-frame with surface-mounted hinges for 12 mm and 20 mm doors, where the stone can take a mechanical fixing through a protected hole.
Weight comes next. A 600 × 900 mm door with a 6 mm face and an 18 mm plywood carrier: the stone contributes about 7.8 kg, the carrier about 6.8 kg, adhesive and edge trim roughly 1 kg, for a leaf near 15.5 kg. A pair of standard concealed hinges is usually rated 8–12 kg. That door needs three hinges, or heavy-duty hinges rated 16–20 kg per pair, with capacity at least twice the leaf weight to survive slam loads and soft-close cycling. Compare durability claims against BIFMA (https://www.bifma.org/) test standards, not a supplier's cycle count.
Flatness is the second failure mode. A stone door that bows by 2 mm will not sit flush, and the gap shows across a room. Specify ±0.3 mm flatness across a 600 mm door and a bow limit of 1.0 mm per meter. Bond under uniform pressure, not clamps at four corners, and cure flat on a true surface. Door gaps of 3 mm absorb small deviations but cannot hide a warp.
Edge reinforcement at the hinge line is not optional on thin doors. A 15 × 10 mm aluminum U-channel set into the back of the carrier, or a 2 mm flat bar routed in behind the hinge plates, spreads screw pull-out across 300–400 mm instead of 30 mm. Drill handle holes after bonding, from the face, with a diamond core and a sacrificial backer; drilling before bonding invites breakout and misalignment. Use 12 mm screws into the carrier, never an anchor set into 6 mm stone.
Door parameter | Recommended specification | Reason |
Leaf size | 600 mm wide maximum, 2,400 mm high maximum | Limits weight and warp; wider leaves need two panels |
Composite build | 6 mm face + 18 mm carrier, or 3 mm face + 20 mm honeycomb | Keeps leaf weight at 14–16 kg |
Hinge cup | 35 mm diameter, bored into carrier, 22.5 mm from edge | Stone has no depth for a 13 mm cup |
Hinge count | 3 per leaf, 4 above 1,200 mm height | Rated capacity at least 2× leaf weight |
Flatness | ±0.3 mm over 600 mm, bow ≤1.0 mm/m | Controls door gap and flush alignment |
Door gap | 3 mm | Absorbs carcass and hinge tolerance |
Edge at hinge line | Aluminum U-channel or flat bar, 300–400 mm long | Spreads screw load, stops pull-out |
A 45° miter hides the core and reads as solid stone at the lowest weight, a polished straight edge is the most economical honest detail on 12 mm and 20 mm panels, and a metal trim covers the arris where a door or credenza is likely to be knocked in service.
The miter is two 45° bevels bonded face to face. On 12 mm stock the finished edge reads 24 mm; on 20 mm it reads 40 mm. Fabricators cut both bevels on a bridge saw or 5-axis CNC, joint them with color-matched epoxy, clamp for 30–60 minutes and leave the assembly 24 hours before polishing. Under raking light at 300 mm the joint line remains visible, and on a veined pattern the vein must be aligned by hand. That is why miter work carries a 25–40% premium over a straight edge and adds three to five days.
A polished straight edge, sometimes called a flat arris, is the default for 12 mm and 20 mm tops. The cut edge gets a 1 mm chamfer to remove the sharp arris, then a six-step diamond polish from 50 to 3000 grit. It is the cost baseline, lead time is unchanged, and the failure mode is a chip at the arris that can be re-polished on site. On 3 mm and 6 mm the same treatment looks like a laminate edge, so specify a trim or miter.
Metal trim solves a different problem. An 8–12 mm anodized aluminum or brass U-profile wraps the panel edge and takes impact that would otherwise chip stone. It adds 15–25% to edge cost and five to seven days for extrusion and anodizing, and it introduces a material junction that must tolerate differential movement. Used well, it makes a 6 mm door look intentional; used badly, it collects dirt in an over-wide gap.
Edge detail | Minimum thickness | Cost vs straight edge | Added lead time | Best for | Typical failure |
45° miter | 6 mm, usually 12–20 mm | +25–40% | 3–5 days | Dining tops, island ends, reception fronts | Visible joint line, chipped bevel during handling |
Polished straight arris | 12–20 mm | Baseline | None | Table tops, plinths, counter fronts | Arris chip, re-polishable on site |
Metal U-trim | 3–6 mm | +15–25% | 5–7 days | Doors, credenzas, knock-prone edges | Gap dirt, anodizing scratch, differential movement |
Half-round bullnose | 12–20 mm | +20–30% | 2–4 days | Family dining, hotel casegoods | Thin polish at the curve, impact chip |
Every cutout is a stress riser, so keep it at least 50 mm from the panel edge, give every internal corner a radius of 5 mm or more, and complete all openings before edge profiling, before bonding and before the component leaves the bench.
A square internal corner concentrates stress by a factor of roughly three to four under load or thermal movement. A 5 mm radius brings that to about 1.5–2, and 8–10 mm is better on a panel that will be lifted, shipped and set onto a frame. The radius is not cosmetic. It is the difference between a cutout that survives a 200 kg handling shock and one that cracks three weeks after installation.
The layout rules belong in the shop drawing. Keep openings 50 mm from any panel edge and 100 mm between two openings. Do not stack a tap hole above a sink cutout corner; offset it by at least 50 mm so the stress fields do not overlap. A cable port should sit at least 80 mm from the edge if the table is lifted by the top.
Sequence matters as much as geometry. Program from the finished component dimensions, cut the perimeter oversize by 2–3 mm, cut all internal openings, then profile and polish, dry-fit, then bond or fix. Waterjet kerf runs 0.8–1.0 mm and leaves a clean edge; a diamond router leaves a better arris but needs a support bed to avoid breakout at the exit. An angle grinder is not a cutting tool for this material: it heats the edge, propagates micro-cracks and voids any fabrication warranty.
Tolerances should be written down. Sink and hob openings typically hold ±1 mm; tap holes and cable grommets hold ±0.5 mm. Seal every exposed cut edge on a composite panel with epoxy or a suitable sealer, because an open core absorbs water, swells and pushes the skin off. An outdoor table with a 50 mm umbrella hole needs the bore sealed and core blocked, or the top will delaminate around the hole within a season.
Opening | Typical size | Minimum corner radius | Minimum distance to edge | Fabrication tolerance |
Cable grommet | 60–80 mm diameter | Round, no corner | 40–50 mm | ±0.5 mm |
Tap or dispenser hole | 35–40 mm diameter | Round, no corner | 50 mm | ±0.5 mm |
Sink cutout | 500–800 mm long | 5 mm, 8–10 mm preferred | 50 mm | ±1 mm |
Hob cutout | 560–750 mm long | 5 mm, 8 mm preferred | 50 mm | ±1 mm |
Umbrella or parasol hole | 40–50 mm diameter | Round, sealed | 80 mm | ±0.5 mm |
Sintered stone travels vertically on an A-frame, never flat and never resting on a pallet edge; panels above 1.2 m² need two handlers, above 2.5 m² four, and a chip that stays under 3 mm on site is filled and re-polished rather than replaced.
Packing starts with orientation: A-frame racks hold panels at 15–20° from vertical, with 10 mm closed-cell foam between layers and straps at 600 mm centers. Flat stacking is the classic mistake: the bottom panel carries everything above it, vibration works the unsupported center, and the crate arrives cracked. A 3,200 × 1,600 mm 12 mm slab weighs about 147 kg, and no foam saves a flat stack across a 1,200 mm span.
Handling follows the weight. Up to 1.2 m², two people can carry a panel on edge with gloves. Between 1.2 and 2.5 m², two people plus a suction-cup lifter is the minimum. Above 2.5 m², four handlers or a mechanical lifter, and a route survey before the crate is opened.
Installation tolerances belong to the frame, not the stone. Set the frame or carcass flat within 1 mm per meter, shim at every fixing point, and bed the panel on flexible silicone or MS-polymer, not rigid construction adhesive. Leave a 2–3 mm expansion gap at walls and fixed returns, and never lift a top by a cutout. Fix through slotted brackets that allow movement, and keep screws out of the stone unless they pass through a clearance hole into a carrier.
Repair has limits. A chip under 3 mm at an edge can be filled with color-matched epoxy, leveled and polished; it passes a hand test but not raking-light inspection at 300 mm. A chip between 3 and 5 mm can be repaired on a straight edge, usually not on a miter where the joint line makes the fill obvious. Anything larger, or any crack into the field, means replacement: a crack does not heal and will propagate under thermal cycling. Report damage with photographs within 48 hours of delivery.
Q: Is sintered stone suitable for furniture, or only for countertops?
A: Yes, but only as an engineered component. A 3 mm or 6 mm panel needs a full bonded backing; 12 mm needs a frame; 20 mm can hold a polished edge with rails at 600–700 mm. Failure risk sits in the substrate, hinge fixing and cutout geometry, not the surface. Bonding quality decides the outcome more than the slab.
Q: What is the thinnest sintered stone that can be used on a cabinet door?
A: Six millimeter is the practical minimum, and only on a carrier panel. Three millimeter works as a decorative face on a 16–18 mm board or a honeycomb core but cannot take a hinge on its own. A 6 mm face on an 18 mm carrier gives a 24 mm door at roughly 15 kg for a 600 × 900 mm leaf.
Q: How much does a sintered stone table top weigh?
A: At 2.4 g/cm³, weight is about 7 kg/m² at 3 mm, 14 kg/m² at 6 mm, 29 kg/m² at 12 mm and 48 kg/m² at 20 mm. A 1,600 × 900 mm top weighs roughly 42 kg in 12 mm and 69 kg in 20 mm. Plan lifting equipment against those figures, not the area of the top.
Q: Can you drill hinge holes directly into sintered stone?
A: Not for a standard 35 mm concealed hinge. The cup is 11.5–13 mm deep, which exceeds a 6 mm slab and leaves too little material in 12 mm. Bore the cup into a bonded carrier or use a metal sub-frame with surface-mounted hinges. Any hole through stone should be diamond-cored from the face with a backer board.
Q: What is the minimum corner radius for a cutout in sintered stone?
A: Five millimeters is the accepted minimum, and 8–10 mm is preferred on panels that will be lifted or shipped. A square corner concentrates stress by three to four; a 5 mm radius reduces that to roughly 1.5–2. Keep cutouts 50 mm from the panel edge and 100 mm apart, and seal the exposed core after cutting.
Q: Can a chipped sintered stone edge be repaired?
A: Chips under 3 mm can be filled with color-matched epoxy, leveled and polished to a standard that passes a hand test but not close inspection under raking light. Chips of 3–5 mm are repairable on a straight edge, rarely on a miter. Cracks and larger chips mean replacement, because a crack propagates under thermal movement. Photograph the damage first.
Q: How should sintered stone panels be stored before installation?
A: Vertically, on an A-frame at 15–20° from vertical, with foam between panels and straps at 600 mm centers. Never store flat or on a pallet edge. Keep the crate closed until the room reaches normal temperature, allow 24 hours of acclimatization, and move panels above 2.5 m² with four handlers or a lifter. Never lean a panel against a wall.