There is a moment in the flax year when a bundle of retted stalks snaps cleanly in your hands, the woody core cracking away from the silky outer fibres, and you know the work of breaking and scutching is about to begin. For anyone growing flax for handspun linen, these two steps turn a field of straw into something a spinning wheel can actually use. Get them right, and the fibre that reaches your hackle will be clean, bright, and ready to draft. Get them wrong, and you will be picking shives out of your yarn for months.

When Are Flax Stalks Ready for Breaking?

Flax is ready to harvest when the lower third of the stalks turns yellow, the seed bolls are still slightly green, and the fibres slip easily from the woody core. In the UK, that is usually late July to early August, depending on variety and sowing date. After pulling or cutting, you need to ret the stalks — either dew retting on grass for two to four weeks or water retting in a trough for a week or so — until the pectins holding fibre to shive break down. The test: bend a stalk. It should crackle, and the fibre should separate in long, silky ribbons rather than snapping like a dry twig. Once retted, dry the bundles thoroughly in a shed or under cover. Damp flax will mould, and mouldy fibre is weak and stained.

The Break: Cracking the Woody Core

Breaking is simply crushing the brittle shive — the woody inner core — without cutting the fibre. A hand brake, whether a traditional trough brake or a simple paddle brake, does this with hinged wooden blades. You feed a handful of dried stalks into the brake, close the blades, and pull the bundle through. Repeat along the length and turn the bundle over. The shives should splinter into short chunks, and the fibre should remain as long as possible. Work outdoors or in a well-ventilated shed: the dust is fine and irritating. Wear gloves and eye protection. Do not over-break. If you hear a sharp snap and see fibre breaking, you are being too rough. The goal is a bundle that feels limp and flexible, with shives crumbling away.

Scutching: Beating Out the Shives

Scutching removes the broken shives from the fibre. Traditionally this is done with a wooden scutching knife — a blunt, sword-shaped blade — and a vertical board or a scutching stool. You hold the bundle over the board and draw the knife downwards, scraping the fibre against the edge. The shives fall away; the fibre stays. Work from the middle of the bundle outwards, turning it as you go. Do not press too hard, or you will fray the fibre. For small quantities, you can also use a dull table knife or a purpose-made scutching blade, but never anything sharp enough to cut. A good rhythm is: break, scutch, break again, scutch again. You will know you are close when the fibre feels soft, pale, and free of hard lumps.

• Scutching knife: blunt wooden blade, about 40–50 cm long.
• Scutching board: a vertical board with a slot or a simple upright post.
• Gloves and eye protection: shives fly.
• A clean sheet: to catch tow and shives for composting.

Separating Line Fibre from Tow

After scutching, your bundle contains long line fibre and shorter, tangled tow. Line fibre is what you want for smooth handspun linen; tow makes a coarser yarn for twine, rug warp, or sturdy cloth. Shake the bundle gently. The tow will fall away or can be pulled free. Keep the two in separate bags. The line fibre is now ready for hackling — the final step before spinning. Hackling combs the fibres parallel, removes the last of the shives and short fibres, and leaves you with a gleaming strick. If you are not ready to hackle, store the scutched fibre in a dry, dark place. A cotton pillowcase works well.

Cleaning, Storing and Dyeing Your Handspun Linen

Once hackled, the fibre can be spun on a wheel or drop spindle. Handspun linen has a crisp, dry handle and a beautiful lustre that softens with every wash. It also takes natural dye beautifully. Because linen is a cellulose fibre, you need a mordant — alum is traditional, often with a tannin pre-treatment such as oak gall or sumac — to help the colour bond. Homegrown dye plants such as madder root for reds, weld for bright yellows, woad for blues, and onion skins for warm golds all work well on handspun linen. Dye your yarn in skeins after spinning, or dye the fibre before spinning if you want a more heathered effect. Keep the dye bath below a simmer for even colour, and rinse gently in cool water. The clean, well-scutched fibre you prepared will reward you with yarn that is strong, lustrous, and entirely your own.