Fabrics
Line Flax and Tow: Why Fibre Length Changes the Linen
Line flax is the long, combed fibre pulled out during hackling and spun into fine, smooth, strong yarn; tow is the shorter, tangled fibre combed away from it. Both come from the same flax crop, but fibre length is what separates them, and it carries straight through into the yarn and the cloth: line gives a cleaner, finer, more even fabric, tow gives a heavier, hairier, more textured one. Knowing which a quotation is built on tells you more about the finished linen than almost any other single fact.
This matters to a buyer because "linen" on a quotation can mean a crisp fine sheeting or a slubby rustic upholstery cloth, and the fibre length behind the yarn is the reason. If you are comparing two linens that look similar on paper but are priced apart, line against tow is one of the first things to pin down.
Where line and tow come from
The split happens at hackling, late in the run from plant to fibre. After the flax has been grown, retted and scutched, the fibre is combed through beds of pins from coarse to fine. This aligns the fibres and sorts them by length. The long fibres that comb through and lie parallel are the line. The short, broken, tangled fibres left in the combs are the tow. The full sequence that gets to this point is set out in how linen is made; the point here is only that one crop yields both, in a proportion set by the quality of the flax and how hard it is combed.
A well grown, well retted, carefully handled flax yields a higher share of long line fibre, which is part of why origin and retting feed into price. Tow is not waste. It is a genuine product with its own uses, and a mill will spin and sell both.
What changes between line and tow
Fibre length drives a chain of differences. Longer fibres overlap more in the yarn, need fewer joins, and sit more parallel, so the yarn runs finer, smoother and stronger with less loose fibre standing off the surface.
| Property | Line flax | Tow |
|---|---|---|
| Fibre length | Long, combed, parallel | Short, broken, tangled |
| Yarn it spins | Fine, smooth, even | Coarser, hairier, more uneven |
| Strength | Higher | Lower |
| Surface | Clean, few protruding ends | Textured, more surface fibre |
| Slub and character | Minimal | Pronounced, part of the look |
| Typical count | Can reach fine counts | Coarse to medium only |
| Typical use | Fine sheeting, shirting, damask | Heavy furnishing, rustic cloth, twine |
| Relative cost | Higher | Lower |
None of this makes line "good" and tow "bad". It makes them suited to different cloths, which is the distinction a specification should capture.
How each spins and what it suits
Line fibre is drawn into a loose rope, drafted finer and twisted. Because the fibres are long and parallel, it can be spun fine, and the finest linen counts are reached only with line fibre. It produces the smooth, closed cloth used for better bed linen, fine shirting, handkerchief linen and damask. The count a mill can reach with it is measured in lea, explained in lea count explained; line is what lets linen push toward the higher, finer counts at all.
Tow is spun from the shorter fibre, so the yarn is coarser, hairier and more uneven by nature. That unevenness is not a fault. It is the slubby, lived-in character many buyers specifically want in a relaxed linen, and it is the right choice for heavier cloth: upholstery, coarse crash, rustic table linen, kitchen cloth and twine. Spinning fine line fibre into a product that calls for tow would cost far more and deliver less of the texture the cloth is meant to have.
A fair amount of mid-weight furnishing linen blends the two, using line for strength where it carries load and tow for body and texture elsewhere. Warp yarns, which take the tension and abrasion of weaving, lean on line or on plied line yarn; weft can carry more tow. This is one reason linen is harder and slower to weave than cotton, a cost covered in why linen costs more to weave than cotton.
Tow is not a lesser fibre
It is easy to read "short fibre, combed away" as second grade, and for fine sheeting that is roughly true. But a buyer building a textured, casual or heavyweight product should not reach reflexively for line. A rustic slub linen made from tow, or from a line and tow mix, can be exactly the right cloth, and paying for fine combed line fibre to make it would be spending for a smoothness the product is designed not to have.
The honest question is never "line or tow" in the abstract, but which fibre suits the weight, hand and look you are specifying. A fine, crisp, even sheeting wants line. A heavy, characterful, slubby furnishing cloth is often better, and better value, in tow or a blend.
How to tell which you are buying, and how to specify it
Fibre length rarely appears as a single line on a quotation, so you read it indirectly. A fine count, a smooth closed surface and a light, even hand point to line. A coarse count, a hairy surface, visible slubs and a heavier hand point to tow or a mix. The surest check is a physical sample: handle it, hold it to the light to see protruding fibre, and look at the evenness of the yarn.
To put it in a specification, do not try to dictate "line only" unless the product genuinely needs it. Instead control the things that follow from fibre length and that a mill can hit and be held to:
- The finished weight in GSM, with a tolerance.
- The yarn count in lea, with its ply.
- The surface and hand you want, described plainly as smooth and fine or textured and slubby, and confirmed against an approved swatch.
- The weave, since the same yarn reads differently in a plain weave than in a damask or twill.
Lock those against a counter sample woven to the agreed specification, and the fibre length looks after itself. The sample in hand tells you what the words on paper intended. For terms, minimums and sampling, see private label.
Common questions
Is line flax better than tow?
Not in general. Line is the long combed fibre that spins fine, smooth, strong yarn for better sheeting and fine linens, so it is better for those. Tow is the short fibre that spins coarser, textured yarn, and it is the right, more economical choice for heavy furnishing cloth and rustic, slubby linen. Match the fibre to the product rather than always reaching for line.
Does tow linen mean low quality?
No. Tow is a genuine fibre with its own uses, not waste. A well made tow or line-and-tow cloth is exactly right for upholstery, coarse crash and textured casual linen. Quality is set by how the cloth is spun, woven and finished for its purpose, not by whether it uses line or tow.
How can I tell line from tow in a sample?
Handle it and hold it to the light. Line gives a smoother, finer, more even surface with few fibres standing off it; tow is hairier, with visible slubs and a heavier, more textured hand. A fine yarn count also points to line, since the finest linen counts can only be spun from long line fibre.
Can one cloth use both line and tow?
Yes, and a lot of mid-weight furnishing linen does. A common approach is line or plied line in the warp, where strength and abrasion resistance matter, with more tow in the weft for body and texture. Specify the weight, count, hand and weave and confirm them on a sample rather than trying to dictate the fibre mix directly.