What Bundle Dyeing Actually Is

Bundle dyeing is the softest, least controlling corner of natural dyeing. Instead of simmering cloth in a vat of liquid, you lay petals, leaves and skins directly onto the fabric, roll it up tightly, and steam the whole parcel. The plant material releases its colour into the cloth where it touches, leaving marks that are diffuse, layered and impossible to repeat exactly.

If you are the sort of maker who wants every metre identical, this will frustrate you. If you are happy to open a bundle and find something you could not have designed, it is enormously satisfying. Linen is the ideal partner: its slightly irregular weave grabs colour unevenly, and the prints settle into the cloth like watercolour on rough paper.

What you need is simple — cloth, a mordant, fresh plant material, a steamer and a good measure of patience. The patience matters most, because the best results come from bundles left to cool and rest overnight rather than rushed.

Choosing and Scouring Your Cloth

Linen, cotton and hemp are all cellulose fibres and all take bundle prints beautifully. Linen gives the most character. Silk and wool also work and often take colour more strongly, but they behave differently and need gentler handling, so start with linen.

New cloth almost always carries sizing, oils or factory finishes that block dye. Scour it first:

• Use roughly one teaspoon of soda ash (sodium carbonate) per litre of hot water.
• Simmer the cloth for about an hour, stirring occasionally.
• Rinse in warm water until it runs clear, then leave the cloth damp.

If you cannot find soda ash, a long hot wash with a pH-neutral soap will do a reasonable job, though results may be slightly paler.

Mordanting for Staying Power

Without a mordant, most plant colour will wash straight out. Alum — aluminium potassium sulphate — is the traditional choice, widely available, and far kinder than the metal salts used in industrial dyeing.

Weigh your dry cloth, then measure alum at roughly 10 to 15 per cent of that weight. Dissolve it in hot water, add the damp cloth, and hold the bath at around 80–85°C for an hour. Do not let it boil hard. Turn off the heat and leave the cloth in the bath overnight, then rinse lightly. Wear gloves, and use a dedicated pan you do not cook in.

Cellulose fibres benefit from a tannin pre-bath before the alum. Steep the scoured cloth overnight in strong black tea, or in a solution made from oak galls or sumac leaves, then mordant as above. A soy milk binder — soaking and drying the cloth three times in diluted soy milk — gives softer, more painterly results, though prints will be lighter.

Gathering Your Plant Material

Fresh material is best, because it is the water in petals and leaves that carries the colour. In a British garden from June to September you have plenty to work with: cosmos, calendula and tagetes marigolds, dahlias, hollyhocks, pelargonium, rose petals, buddleia, tansy and yarrow all print well. For foliage, try eucalyptus, Japanese maple, oak, birch, ferns, blackberry, rose leaves and scented geranium. Onion skins and red cabbage are useful kitchen additions.

• Pick in the morning after the dew has dried but before the heat of the day, when petals are plump.
• Forage only from your own garden or where you have permission, and never strip a plant or a public hedgerow.
• If using dried petals, rehydrate them briefly in warm water so they release colour evenly.
• Work with thin layers — a single petal thickness prints far better than a deep heap.

Rolling the Bundle

Lay your damp, mordanted cloth flat on a table. Arrange petals and leaves in a single, sparse layer, overlapping colours here and there and leaving gaps — the gaps become part of the pattern. Place leaves with their veins facing the cloth, as the vein structure often prints most clearly.

Roll the cloth around a wooden dowel or an old broom handle, keeping the tension even and the layers smooth. Tie it firmly with cotton string at intervals of about five centimetres. Tight bundling gives crisper marks; a looser roll gives soft, hazy washes. Both are good — decide which you want before you start.

If you have iron water (a teaspoon of ferrous sulphate dissolved in a litre of water), a light sprinkle over the petals will sadden and deepen the colours. Use it sparingly: iron can weaken cellulose fibres over time.

Steaming, Resting and Opening

Steam rather than boil. A colander set over a lidded pan, a bamboo steamer, or an old vegetable steamer all work. Sit the bundle on the rack above simmering water, cover, and steam gently for one to two hours, topping up the water as needed. Linen usually wants the longer end of that range; silk and wool need less.

Then comes the part most people skip. Let the bundle cool completely, still tied, ideally overnight, wrapped in a plastic bag so it does not dry out. Colour continues to migrate and fix during this rest, and the difference is substantial.

Open it outdoors or over a sink. Peel the plant material away gently — some pieces will have left ghostly outlines, which is entirely normal. Rinse the cloth in cool water with a pH-neutral soap until the water runs clear, then dry it in the shade.

• Wash rarely, by hand, in cool water.
• Store folded, away from direct light.
• Iron on the reverse while slightly damp.
• Expect the colours to mellow over months — many flower prints are fugitive and soften to dusty, gentle tones.

That softening is not failure. It is the nature of the craft, and part of what makes a bundle-dyed linen cloth feel alive rather than printed.