Silk by the momme: the weights that matter

What a momme weighs

The unit is Japanese and older than the trade that still uses it. A silk graded 19 momme means a standard bolt, 45 inches wide and 100 yards long, weighs 19 pounds; more momme means more silk packed into the same cloth, which reads in the hand as density and depth of drape. The scale is the same wherever it appears: the 19 and 22 on pillowcase listings and the 8 on a scarf lining sit on one ruler.

The bands worth knowing

Habotai holds the light end. At 8 momme, the classic weight for linings and light scarves, it floats and takes print beautifully, and it wears through at pressure points because there is simply less of it. Charmeuse, the satin weave with a matte crepe back, earns its reputation between about 16 and 22 momme: blouses, slips and the better pillowcases, with 19 as the workhorse grade. Past the low twenties the character changes. Heavier twills and crepes stop flowing and start holding a line, which is where silk dresses and tailoring live.

Why 12 momme charmeuse disappoints

Twelve momme charmeuse is sold hard online because it is cheap to weave and photographs like its heavier siblings. On the body the difference arrives quickly: semi sheer over anything dark, quick to wrinkle, thin enough that a stressed seam pulls open into little ladders at the hip or shoulder. The first wash settles it. With too little fibre to fall back into drape, the cloth dries flat and papery, and at 12 momme it weighs about 52 grams a square metre, which is a light scarf weight asked to do a blouse’s job. The price will look like silk's price. The cloth will not do silk's job.

Hand tests that ruin nothing

Crush and release: gather a handful, hold it for three seconds, open your hand. Silk feels dry against the palm, faintly grainy, and it warms in your fist; the soft creases it takes begin falling out as it hangs. Polyester satin feels slick, almost wet, and springs back without ever having felt alive.

The cool touch that warms: lay your palm flat on the cloth. Silk reads cool for a moment, then takes your temperature within a few seconds. Polyester warms more slowly and stays slick while it does.

The shine: silk filament has a triangular cross section with rounded corners and an unusually smooth surface, so it bends light the way a prism does, and real charmeuse has a lustre with depth that shifts as the cloth moves. Polyester satin gives one flat white glare, the shine of a raincoat. Turn it over while you are at it: charmeuse is matte on the back by construction, and a cloth equally shiny on both faces is a different weave, often a habotai or a synthetic satin. (The burn test settles arguments and ruins corners; leave it to people who already own the fabric.)

Satin is a weave, not a fibre

Satin names a way of floating threads over each other, and a satin can be woven from anything. “Silk satin” on a fibre line is a material; “satin” alone in a product title is a surface. The phrases to read as warnings are the ones that borrow the word: “silk touch”, “silky”, “satin finish”. They exist because the fibre content line, which the law does require and does police, cannot say silk. If that line says polyester, everything else on the tag is atmosphere.

Labels go missing, of course, especially on vintage rails, which is where the hand tests earn their keep; the guide to secondhand formats explains which shops review condition before a piece reaches the floor. For scarves, where a hand rolled hem is its own tell, the journal's silk scarf guide goes deeper.

Questions to ask at the counter

• What momme is this, and does the maker state it or is the seller estimating?
• What does the fibre content line say, word for word?
• Is the cloth a charmeuse, or a different silk entirely (habotai, twill, crepe, georgette)?
• How does the maker say to wash it, and does the seller’s advice agree?
• Can I take it to the window and handle it for a minute?

Weight is the number worth asking for

A momme figure on a listing is a merchant showing the maths, and worth rewarding. Browse the Toronto catalog with the bands in mind, and treat any silk piece that states its weight as a seller who expects you to know.