Denier is the weight in grams of 9,000 metres of yarn, and the filament count is the number of individual strands bundled together to make that yarn. Polyester filament yarns used in Surat typically run from about 30 to 150 denier, with filament counts such as 36, 48, 72, 96 and 144. A yarn is written as denier over filaments, for example 75/36 or 150/144. Understanding these two numbers lets a buyer control the weight, hand and look of a fabric before a single metre is woven.
What denier tells you
A higher denier means a heavier, thicker yarn, so for a given construction the fabric will be heavier and more opaque. Light chiffons and georgettes use fine yarns at the lower end of the range, while satins, crepes and suiting weights use heavier yarns. Denier alone does not fix fabric weight, because the number of ends and picks per inch also matters, but it is the first variable to agree. When comparing quotations, make sure the yarn denier is the same, since a lower price often comes from a lighter yarn.
Surat suppliers often describe a fabric by its yarn alone, for example 75 denier georgette or 150 denier crepe. This shorthand is useful as long as the full construction is also fixed in writing on the order.
What the filament count tells you
For the same denier, more filaments mean each strand is finer, and the yarn is softer, more flexible and smoother to the touch. A 75/36 yarn feels firmer than a 75/72, and a 150/144 feels softer than a 150/48. Fine-filament yarns are often called micro or semi-micro, and they give peach-skin and soft-touch finishes. They are usually more expensive and can be harder to weave on older looms, so the choice is a balance between hand feel and cost.
Filament count also affects how a fabric takes a print. Finer filaments give a smoother surface and crisper print definition, which matters for digital and sublimation work.
Common yarn types
- Fully drawn yarn (FDY): a flat, smooth filament yarn that gives sheen and a crisp hand, used in satins, taffetas and linings.
- Partially oriented yarn (POY): the feedstock for texturising, rarely woven directly.
- Draw textured yarn (DTY): yarn that has been texturised to add bulk, stretch and a matte look, used in crepes, suitings and knits.
- Crepe-twist yarn: FDY or DTY given a high twist, used for georgette and crepe constructions.
- Cationic dyeable and dope-dyed yarns: variants that take different dyes or arrive already coloured, useful for two-tone effects and deep shades.
How we help
We visit weaving and texturising units to confirm the yarn actually used matches what was quoted, which is one of the most common causes of weight shortfalls. We audit the units, send sealed samples to an NABL-accredited lab for weight and construction checks, inspect rolls before loading and supervise loading. You receive weekly updates, and we hold one approved supplier plus one backup. A free 20-minute sourcing review is a quick way to translate a reference swatch into a yarn specification.