Arashi shibori — the Japanese technique of wrapping cloth around a pole before dyeing — produces those beautiful diagonal stripes that look as though they have been blown across the surface by weather. The name means "storm", and once you have seen a length of silk unwrapped from the pole, still dripping, you will understand why. The lines have movement in them. They are never quite straight, never quite even, and that irregularity is the whole point.
For a small studio, arashi is unusually generous. It needs no expensive equipment, takes up very little space once the cloth is compressed, and scales from a single scarf to several metres of lightweight fabric. Because the pole does the work of holding tension, your hands are free to focus on the quality of the wrap rather than on wrestling with large pieces of cloth. It also sits happily alongside hand sewing and other slow textile crafts: a naturally dyed arashi panel makes a wonderful centre for a hand-stitched cushion or a simple wrap.
The technique is at its best on lightweight, smooth fabrics. Cotton voile, silk habotai, fine linen and cotton lawn all take a crisp diagonal with lovely definition. Heavy canvas and thick wool are difficult to compress tightly and tend to give muddy, soft-edged marks.
If you are using a natural dye such as madder, weld, onion skin or indigo, prepare your dye bath and mordant first. Alum gives clear, bright results on plant fibres; an iron after-bath will sadden and darken the stripes beautifully.
This is where the diagonal is born. Lay your damp cloth flat, then place the pole along one edge at roughly a 45-degree angle. Begin wrapping, turning the pole steadily away from you and keeping the fabric taut as it spirals around. The angle you hold determines the angle of every stripe.
Small adjustments matter. If the cloth slips and stacks up on itself, the lines will bunch and break. Work slowly, smoothing the fabric with your free hand as you go, and let each turn sit snugly against the last. For a classic arashi look, you want the layers to overlap slightly rather than lie perfectly flat — this is what creates the fine, feathered secondary lines between the main stripes.
Once the whole length is wrapped, you can add a twist. Holding both ends of the pole, rotate the cloth a quarter turn so the pleats spiral rather than sit square. This single movement is what gives the finished cloth its distinctive chevron effect.
Now push the cloth down the pole, concertina-fashion, until it forms a tight, dense cylinder near one end. This compression is essential: it forces the folds against one another and resists the dye, leaving the pale diagonal lines behind.
Bind the compressed bundle firmly with elastic bands or string at 2–3cm intervals. Tight enough that the cloth will not shift, but not so tight that you bruise the fibres. For a two-tone effect, you can bind the whole bundle and then loosen a section, or wrap extra thread spiralling around the pole to create finer resist lines inside the broad stripes.
Wear gloves from here on. Natural dyes are lovely but they are also very good at dyeing hands.
Lower the bound pole into your dye bath. For most plant dyes, keep the bath at around 60–80°C and hold it there for 45 minutes to an hour, turning the pole occasionally so the colour reaches every side. Indigo is different: it works cold, and you will want several short dips, oxidising for ten minutes between each.
When the colour looks right, lift the pole out and rinse it briefly in cool water before unwrapping. Unwrap wet — dry cloth holds the pleats and you risk setting permanent creases. Cut the bindings carefully with small scissors, then unwind the cloth from the pole and open it out into a basin of cool water. Rinse until the water runs clear, then wash gently with a pH-neutral soap.
The reveal is the reward. Every wrap is different, and no two lengths will ever match exactly, which is precisely why arashi suits hand makers rather than factories.
Hang your cloth to dry in the shade, away from direct sun, and iron it damp on the reverse while it is still slightly humid. The diagonal lines will soften a little with washing, so treat the first iron as part of the design.
Arashi is one of those techniques that teaches patience in the best way. The wrapping takes time, the dyeing takes time, and the unwrapping asks you to slow down and look. Work a few scarves through the seasons, note what each pole and angle gives you, and you will soon have a repertoire of diagonals entirely your own.
The Indigo Garret shares practical, down-to-earth guidance on natural dyeing, hand sewing and slow textile crafts for small studios for readers across the UK.
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