Woven from double cocoons — the slubs are the point, not a defect.
Momme
18–25 mm
Weight
≈ 78–108 gsm
Width
140 cm
Availability
Stock + dye to order
Dupioni — also spelled dupion — is woven from yarns reeled from double cocoons, where two silkworms have spun together. Those fused filaments cannot be reeled evenly, so the cloth carries random slubs and a slightly irregular surface. It is the one silk where inconsistency is the specification.
What buyers actually use it for is structure. Dupioni presses into a knife pleat that stays, holds a sculpted bodice, and gives a gown a crisp, almost papery silhouette rather than a fluid one. It also has a subtle two-tone shimmer because the slubs catch light at different angles.
At a glance
Natural slub texture from double-cocoon yarn — no two metres identical
Crisp hand that takes and holds pleats, tucks and sculpted seams
Faint two-tone lustre; dye reads slightly deeper in the slubs
140 cm width, so a full skirt often cuts from a single length
How Silk Dupioni is woven
Structure: Plain weave with doubled irregular weft
Interlacing diagram — warp ends vertical, weft picks horizontal. A dark cell is a point where the warp passes over the weft.
Dupioni is made from the filaments of double cocoons, where two silkworms spun together and the threads interlock. The weft is a doubled, irregular yarn, and that irregularity survives into the cloth as the slubs and thick places the fabric is known for.
The slubs are structural, not a defect, and they are also the reason two lengths of dupioni never look identical. Plan for the irregularity: match panels across the width, and expect the characteristic shot-silk effect where warp and weft take dye differently.
Understanding the structure is the cheapest way to predict behaviour: the length of the float decides the lustre and the snag resistance, and the twist in the yarn decides how much the cloth creases. If you are choosing between two families, the weight chart and the fabric selector filter on both.
Weights we weave — and what each one is for
Momme fixes the price, the opacity and the drape. The table below is the range we actually quote for Silk Dupioni. The exact weight and width are confirmed in writing on every quotation.
Momme
Approx. gsm
What it is for
Qualities
18 mm
≈ 78 gsm
The standard dupioni: structured dresses, skirts, jackets, cushions
19 mm Dupioni
19 mm
≈ 82 gsm
The standard dupioni: structured dresses, skirts, jackets, cushions
19 mm Dupioni
20 mm
≈ 86 gsm
The standard dupioni: structured dresses, skirts, jackets, cushions
19 mm Dupioni
22 mm
≈ 95 gsm
Heavy dupioni for sculpted bodices, corsetry and upholstery
19 mm Dupioni, 25 mm Heavy Dupioni
25 mm
≈ 108 gsm
Heavy dupioni for sculpted bodices, corsetry and upholstery
19 mm Dupioni, 25 mm Heavy Dupioni
Not sure which weight you need? The momme chart converts every weight to gsm and matches each band to the garments it serves, and the selector filters the whole library by weight and application.
What Silk Dupioni Fabric is used for
Typical applications in this family are structured bridal and evening gowns, sculpted bodices, pleated skirts, tailored jackets, cushions and drapes, stage costume. Each link opens the buying guide for that application, with the weight windows we recommend and the fabrics our clients actually order.
Both are slubbed. Dupioni is crisper and holds a hard pleat; shantung is softer and drapes more, with a finer slub. Read the Silk Shantung guide.
Cutting and sewing this weight
Silk is not difficult to sew, but it punishes the wrong needle. The parameters below are the ones our clients converge on for this weight band; test on an offcut first, because a needle size that is fine for one finish will pick threads in another.
Parameter
What we recommend for 18–25 mm (≈ 78–108 gsm)
Machine needle
70/10 to 80/12, fresh needle every few garments
Stitch length
10–12 stitches per inch (2.5 mm)
Thread
Fine mercerised cotton, silk-finished polyester, or spun silk — matched to the shell so the seam does not pucker
Interlining / support
25–40 gsm, or a hair-canvas chest piece for a structured bodice
Pressing
silk setting with steam, always through a cloth; do not glaze a satin face
Pre-shrinking
cold soak, or have the piece steam-shrunk before laying the pattern
Seam finish
French or hairline seam on anything sheer; overlocked and turned on opaque weights
Cut single layer. Silk shifts, and a folded lay gives you two panels that are not mirror images.
Pin inside the seam allowance only, with fine glass-head or silk pins — a pin hole through charmeuse or a satin face is permanent.
Use a fine, well-twisted thread. A thick thread in a fine needle leaves a visible channel and puckers the seam.
Mark the straight grain on every panel before you lift it off the table. On a bias-cut garment the grain line is the whole design.
French seams or hairline seams on anything sheer: a plain turned seam shows as a dark line through the cloth.
How much silk dupioni to order
Planning quantities, from standard block patterns. Figures are for a plain layout with no pattern repeat to match.
Garment or item
At 114 cm width
At 140 cm width
Notes
Scarf 90 × 90 cm
1.0 m
1.0 m
Includes a narrow hand-rolled hem; allow more for a wide hem or a border print
Camisole or shell top
1.2 m
1.0 m
Bias cut; add 15% if the design is cut on the true bias
Blouse or shirt
2.0 m
1.6 m
Straight body, set-in sleeve; more for a gathered or oversized body
A-line skirt
1.5 m
1.2 m
Above-knee; a full circle skirt needs roughly double
Straight dress
2.8 m
2.2 m
Knee length, no train, bodice and skirt from one length
Bias slip dress
3.2 m
2.6 m
Bias layouts waste more; buy the length the pattern states, not the flat measure
Evening gown with train
5.5 m
4.5 m
Floor length; fitted bodice plus a trained skirt needs a second length to match
Standard pillowcase 50 × 70 cm
0.7 m
0.7 m
Envelope closure; pair two if the fabric has a directional nap
Curtain panel, 2× fullness
—
3.0 m per metre of drop
Rule of thumb: drop × 2 to 2.5 for pencil pleat, plus hem and heading allowance
These are planning figures from standard block patterns, not a cutting guarantee. They assume no pattern matching and no nap. Add 10–15% for a large repeat or a one-direction print, and add your shrinkage allowance before you order. If a program is costing on metres, send us the marker and we will quote against the actual consumption.
What to check before you cut
Every roll is inspected before dispatch, but cloth is a natural product and dye lots vary. These are the eight checks worth making at goods-in — they take two minutes and they are the difference between a claim and a write-off.
Check
How to do it
What is a problem
Shading, side-to-side and end-to-end
Lay the cloth folded end to end and across the width under daylight or a D65 lamp.
Any visible step between the centre and the selvedge, or between the start and the end of a roll.
Bowing and skewing
Square the cloth on a table and measure the diagonal, or check a printed repeat against the selvedge.
The weft running more than a few centimetres off square across the width — it distorts every panel cut from it.
Slubs, thick and thin places
Expected and structural in dupioni and shantung; check for consistency across panels.
A slub count that varies sharply between panels of the same garment.
Broken ends, floats, snagged yarns
Hold the cloth up to a light source and scan across the width.
Any broken filament on a satin face — it will run under tension.
Crease marks and chafe marks
Unroll flat and look across the surface at a low angle.
Permanent creases pressed into a finish, or abraded lines where the roll has rubbed in transit.
Soiling, oil and water marks
Scan both sides; some marks only show on the reverse.
Any spot. Silk stains cannot be safely spot-cleaned before dyeing.
Width short against the ticket
Measure the usable width between the selvedges, excluding the pin-holes.
Less usable width than the quotation states — markers are often drawn tight.
Hand and finish against the approved sample
Compare to the bulk sample you signed off, in the same lighting.
A softer or firmer hand, or a difference in lustre. Finishing drifts between dye lots.
Every roll we ship is inspected before it leaves, and any piece with a defect is cut short and the metrage credited rather than passed on. Even so, check the cloth before it goes under the knife: once a piece is cut it is accepted. Report anything within seven days of delivery with the roll number.
Ordering: minimums, colours and finishing
Stock colours are available from 1 metre, which makes sampling practical. Custom dyeing starts at 40 metres per colour with a lab dip approved before bulk; digital printing starts at 40 metres per design after a strike-off. Widths are 140 cm, and the momme tolerance is stated on the quotation rather than assumed.
For a production program, approve a one-metre cut in the bulk colour before the roll is dyed — screen colour and cloth colour are not the same thing, and silk dupioni fabric is a family where a shade difference shows across a seam.
Care and handling
Hand wash cold with a pH-neutral silk detergent, or dry clean. Do not soak or wring; roll in a towel and dry flat away from direct sun. Press on the reverse with a cool iron through a cloth. Expect 3–5% shrinkage on the first wash, so pre-shrink before cutting a production run.
Frequently asked questions
Is dupioni real silk?
Yes — genuine dupioni is 100% mulberry silk woven from double-cocoon yarn. Polyester "dupioni" exists and is usually glossier, stiffer in a plastic way, and does not soften with wear. Ask for the fibre content and a swatch.
What is dupioni used for?
Anything that needs crisp structure: sculpted bridal and evening gowns, pleated skirts, tailored jackets, corsetry, and home textiles such as cushions and drapes. It is a poor choice for fluid, bias-cut styles.
Does dupioni wrinkle?
It creases sharply rather than softly — which is why it pleats so well — but it also sheds creases along the original fold. Hang garments after wear and steam rather than press flat, or the slub texture flattens.
19mm or 25mm dupioni?
19 mm for dresses, skirts and jackets; 25 mm when the cloth has to hold a sculpted shape on its own, for corsetry or upholstery. 22 mm is the usual compromise for gowns.
How do I know this is real mulberry silk and not polyester satin?
Ask for a burn test on a cutting: mulberry silk burns slowly, smells like burning hair, and leaves a brittle black bead that crushes to powder. Polyester melts, smells sweet-acrid and leaves a hard bead. We supply 100% mulberry silk and state the composition on every quotation; if you need formal confirmation we can arrange third-party fibre analysis on the bulk.
What width do the rolls come in, and can I get a wider one?
Standard widths are 114 cm and 140 cm, and the usable width excludes the selvedge. Wider widths are woven to order on a minimum quantity. If a marker needs a specific width, tell us before quoting — the price is calculated on the width as well as the weight.
How much shrinkage should I allow?
Silk typically relaxes 3–8% on the first wet treatment, more on washed finishes and less on a fabric that has already been sand-washed. The safe approach is to pre-shrink a full length before cutting a production run, or to have the piece steam-shrunk. Do not guess: the allowance belongs in the marker, not in the pattern.
Can you match a colour I send you?
Yes. Send a physical swatch or a Pantone reference and we dye a lab dip for approval before bulk. Custom colours start at 40 metres per colour. Screen and monitor colours are not a reliable reference — a photograph of a fabric is two colour conversions away from the cloth.
What is the lead time?
Stock colours dispatch in a few working days. Dyed-to-order runs need the lab dip approved first, then dyeing and finishing; printed runs need a strike-off approved before bulk. The quotation carries the confirmed date for your quantity, and we would rather quote a longer date and meet it.
Do you ship samples, and can I order just one metre?
Yes. Stock colours are available from one metre so you can test drape, dye uptake and washing before committing. We post swatch cards worldwide; tell us which families you are comparing and we will send the relevant colours.
PHOTOGRAPHED FROM OUR STOCK
Silk Dupioni — the cloth, as it is
Unretouched photographs of rolls and cut lengths from our own floor. Colour varies between dye lots; the swatch card is the only reliable reference.
