Walnut Shell Natural Dye
Juglans regia L. · Cut or Powdered · Croatia
Create golden beige, camel, tan and earthy brown shades with dried walnut hard shells.
This dye material comes from the hard inner shell surrounding the walnut kernel - not the fleshy green outer husk. Hard shells produce a gentler and more golden palette than green husks, which are generally the strongest part of the fruit for producing deep walnut browns.
Choose cut shells for soaking and slow extraction, or powdered shells for quicker and more thorough contact with the extraction water.
At a glance
| Feature | Details |
|---|---|
| Botanical name | Juglans regia L. |
| Plant part | Dried hard inner shell |
| Origin | Croatia |
| Forms | Cut or powdered |
| Material | Raw botanical dye material - not an extract |
| Colours | Golden beige, camel, tan and earthy brown |
| Fibres | Wool, silk, cotton and linen |
| Mordant | Optional on some fibres; recommended for consistency and durability |
| Colourfastness | Generally good when suitably prepared, dyed and finished |
Hard shells and green husks are different dyes
Walnut hard shells should not be confused with the fleshy green husks surrounding newly formed walnuts.
Green walnut husks generally produce the richest and darkest browns. Dried hard shells give a gentler range of golden beige, camel, tan and medium earthy brown shades.
The final colour depends on the fibre, dye quantity, mordant, water chemistry, pH, extraction temperature and processing time.
Choosing a form
Cut walnut shells
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Suitable for overnight soaking and slow decoctions
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Easy to contain and strain from the dye liquid
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May be extracted repeatedly for successively paler baths
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Best when a slower, cleaner extraction is preferred
Powdered walnut shells
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Finely ground dried brown walnut hard shells
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Greater surface area encourages faster extraction
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Produces more sediment than the cut form
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Best contained in a fine cloth or dye bag
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Requires regular stirring to prevent settling and scorching
The powdered form is raw ground shell—not a concentrated extract.
How much to use
For lighter golden beige and camel shades, begin with:
50–100g walnut shells per 100g dry fibre
Equivalent to 50–100% WOF - weight of dry fibre.
For deeper earthy browns, use up to:
200g walnut shells per 100g dry fibre
Equivalent to 200% WOF.
Powdered shells may release their available colour more quickly and thoroughly than the cut form, but the same starting quantities can be used.
Hard shells naturally produce gentler colour than green walnut husks. Sample first when working towards a particular result.
Basic dyeing guide
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Prepare: Scour the fibre thoroughly. Mordant using a fibre-appropriate method if desired, then wet the fibre completely.
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Soak: Cover the walnut shells with water and leave overnight.
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Extract: Heat the shells and soaking liquid to approximately 80–90°C for one to two hours.
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Strain: Strain through a cloth. Powdered shells are best contained inside a fine dye bag.
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Dye: Add the prepared fibre and hold at approximately 80–85°C for one hour.
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Deepen: Allow the fibre to cool in the dye bath or leave it overnight.
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Finish: Rinse thoroughly and wash gently.
Dyeing cotton, linen or another cellulose fibre? Find our cellulose mordanting guide here.
Tips from the dye pot
| Tip | Details |
|---|---|
| Choose the form | Cut shells suit slow extraction; powdered shells extract more quickly but create more sediment. |
| Extend the soak | An overnight soak helps soften the cut shells and begin releasing their colour. |
| Contain the powder | Use a fine cloth or dye bag to keep powdered shell sediment away from the fibre. |
| Stir regularly | Powder can settle and scorch if left undisturbed on the bottom of the pot. |
| Reuse the shells | Repeated extraction of the cut shells may produce useful paler shades. |
| Consider mordanting | Walnut tannins give the material an affinity with fibre, but suitable mordanting can improve consistency and durability. |
| Modify carefully | Iron shifts the colour towards grey-brown or charcoal-brown. Suggested use is approximately 1–3% WOF. Iron acetate is generally gentler on fibres than ferrous sulphate. |
| Keep notes | Record the fibre, mordant, pH, water chemistry, dye quantity, temperature and processing time. |
Colourfastness
Walnut hard shells can provide good washfastness and useful lightfastness when properly extracted, applied and finished.
Performance depends on the fibre, mordant, depth of shade and aftercare. The hard shell should not be expected to produce the almost black-brown shades sometimes associated with green walnut husks.
Storage and safe handling
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Store sealed in a cool, dry place away from direct sunlight.
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For textile dyeing, paper and craft use only.
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Not for consumption or use in food, drinks, cosmetics or herbal preparations.
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Avoid creating or breathing dust, particularly when handling the powdered form.
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Prevent contact with the eyes, mouth and open wounds.
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Wear suitable protective equipment when handling dusty material.
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Follow the safety instructions for every mordant and modifier used.
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Use dedicated dyeing utensils and containers - never food-preparation equipment.
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Keep away from food, children and pets.
What you receive
Your chosen net weight of cut or powdered dried walnut hard shells, supplied in a pouch.
Mordants, modifiers and other dyeing supplies are sold separately.
Display jars and photographic props are not included.
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