ANGĀR Case study · Khalpat Inc. · 2026
Material research  ·  Textile engineering  ·  Weave architecture

ANGĀR

A cloth that can't be ruined by an ember, because the ember is part of how it's meant to be read.

Tap the cloth to drop an ember
Role
Solo — research, material design, protocol, software
Discipline
Textile engineering · flammability · weave architecture
Output
Test protocol · open dataset · 3 cloth qualities · compiler module
Applied to
AW27 — The Salt Route
Status
Protocol drafted · atlas in progress
01

One hole
retires a
garment.

Three to eight millimetres. It appears in under a second. The seams are fine, the fabric is fine, the fit you spent two winters breaking in is fine.

But a jacket with a burn hole is a jacket you stop wearing to things that matter. A single point of failure discards the entire object.

That asymmetry is the whole opportunity, and nobody in apparel has taken it.

D 6.4 mm t < 1 s
Fig. 01 — The failure. Full penetration, fused edge, propagating soot ring
02

Everyone
solves the
wrong fire.

Flame-retardant chemistry interrupts combustion. An ember never starts one. It simply exceeds the melting point of the polymer and passes through, the way a soldering iron passes through a plastic bag.

A · THERMOPLASTIC — PET / NYLON Melts at 215 – 260 °C The coal never has to ignite anything. Through-and-through. Edges fuse and bead. B · PROTEIN FIBRE — WOOL / YAK Chars at ~570 – 600 °C Char crust insulates, oxygen is excluded, the coal starves. Damage stays on top.
Fig. 02 — Two different failures wearing the same name. Indicative, not to scale
0 apparel flammability standards test a smouldering ember. Upholstery and mattress standards have tested it for decades.
StandardApplies toIgnition sourceTests ember
16 CFR 1610General apparelFlame, 45°No
ASTM D6413Textiles, verticalFlame, 12 sNo
ISO 15025Protective clothingFlame, surface / edgeNo
EN ISO 14116Limited flame spreadFlameNo
EN ISO 11612 · NFPA 2112Heat & flame PPEFlame, radiant, molten metalNo
EN 1021-1Upholstered furnitureSmouldering cigaretteYes
BS 5852 source 0Upholstered compositesSmouldering cigaretteYes
16 CFR 1632MattressesSmouldering cigaretteYes

Your sofa is tested against the thing that ruins your jacket. Your jacket is not.

03

So stop
preventing
the burn.

Fireproof apparel is a commoditised, safety-regulated category owned by chemical companies, and nobody wants a Nomex hoodie. The objective changes: decide in advance what the burn is allowed to do.

01

Bound it.

Damage terminates at a boundary the designer specified, not one the ember chose. Maximum burn size becomes a dimension on a spec sheet.

02

Reveal it.

Beneath the face cloth sits a second ground in crimson. Burning through the face isn't a loss of material. It's a change of state.

03

Record it.

Because every burn is bounded and lands on a grid, marks accumulate as pattern rather than damage. After two winters the jacket is a document.

04

Build the
missing
test.

No material claim is worth anything without a way to measure it. Since no apparel standard measures ember damage, the first deliverable isn't a garment — it's a protocol, published openly, reproducible for about ₹3,000 of equipment.

EDT-01, the Ember Drop Test. Fixed source, fixed drop height, 45° inclination matched to the standard apparel flammability geometry, 24-hour conditioning, single and double layer, tested as-received and after 5 and 20 washes.

CE = 1 − ( Dh / Dh,control )

Containment efficiency, measured against the same ground cloth woven without the lattice. This isolates what the architecture contributes from what the fibre contributes — the single most important thing to separate. A structure that looks good only because it sits on wool isn't an innovation.

EDT-01 RIG 24 h @ 20 °C / 65 % RH SOURCE h = 120 mm 45° SPECIMEN 200 × 200 MACRO · FIXED d, EV
Fig. 03 — EDT-01 rig. Every variable that isn't the fabric is nailed down
Dh · Dc

Hole diameter and char diameter, measured off a macro frame against a scale bar.

Rp · Ta

Propagation beyond the contact patch, and afterglow duration from source removal.

Lp

Layers penetrated, two-layer configuration. Weighted heaviest — it's the failure a wearer notices.

05

Then burn
250 pieces
of cloth.

Fifty fabrics down. Five repeats across. Every burn photographed under identical light against a scale bar.

Anyone can propose a mechanism. Almost nobody sits down and burns two hundred and fifty swatches under controlled conditions and publishes the raw numbers.

That's why the atlas is the part that can't be argued with and can't be copied quickly. It's evidence, it's a moat, and printed at scale it's the campaign image — no styling, no models. The research is the visual.

The Burn Atlas  ·  250 documented burns  ·  50 fabrics × 5 repeats Open dataset  ·  CSV + images + versioned protocol
06

The mechanism

Step 01 — the lattice

Weave a grid of flame-resistant yarn through an untreated ground.

Only 8–15 % of the yarn in the cloth needs treating. You buy flame resistance for a fraction of the fibre, not all of it.

Step 02 — the coal lands

An ember drops into a cell and starts consuming the ground.

Radial spread, exactly as it would on any untreated cloth. Nothing has been prevented yet.

Step 03 — containment

The burn meets the lattice and stops.

Bounded on four sides by material that won't carry it further. The damage is now a known quantity instead of an accident.

Step 04 — the reveal

What's left is a crimson pixel on a black grid.

The ground beneath was chosen for this. Burning through the face isn't loss — it's a change of state, and it lands on a grid, so it composes.

p D max = p√2
Fig. 04 — Containment lattice. The signature mechanism
Dmax = p · √2

A burn spreads radially until it hits a wall, so the largest possible damage in a square cell is its diagonal. A 6 mm pitch bounds damage at 8.5 mm. A 10 mm pitch bounds it at 14.1 mm. Pitch becomes a design variable with an honest trade-off: tighter grid, smaller damage, more visible structure in the face.

Maximum burn size stops being luck. It becomes a number you print on a spec sheet.

07

Three
constructions.

Coarse Himalayan and yak wool, chosen because the physics and the collection wanted the same material. Wool chars where polyester melts, high moisture regain buys time, and the char crust starves the coal of oxygen — which is exactly the self-limiting behaviour the architecture depends on.

Dobby grid

FR yarn substituted at fixed warp and weft intervals in a twill ground. Simplest to weave, mill-friendly, lattice reads as a shadow check.

Entry quality

Leno-locked

FR yarns cross-locked at the cell boundary. Strongest containment, resists yarn slippage at the char edge. More complex loom setup.

Performance quality

Double cloth

Void-black face over crimson ground, stitched at lattice intersections. Delivers the reveal properly. Heavier, dearer, the flagship.

Flagship quality
08

Into the
collection.

AW27 — The Salt Route. The six pieces were locked. So this lands as a fabric specification and one detail — the correct way for material research to enter a collection that's already been designed.

VectorImplementation
ClothTwo of the six in double-cloth reveal quality. The rest in dobby grid where weight allows.
ColourVoid-black face over crimson ground. The palette becomes a material behaviour, not a swatch.
PlacementLattice concentrated where damage statistically lands — chest, forearm, front thigh, hood front.
LabelWoven, not printed. Instruction, not warning: this cloth keeps a record of fire. Never "flame resistant". Never "fireproof".
CampaignThe burn atlas printed large. Product photography second.
1 story, not two. High-altitude life is lived around fire — the research explains why the collection is woven the way it is, instead of decorating it.

Every cloth worn near fire gets marked. That was never the question.

The question was whether the mark arrives as an accident — or as a dimension specified before the cloth was ever woven.

Bounded at the cell wall. Revealed in crimson. Kept as a record of where the wearer stood.

Dmax = p √2