BARBERRY ROOT BARK DYE

Barberry Root Bark Natural Dye

Berberis spp. · Cut or Ground · Brilliant Botanical Yellow

Barberry root bark is a traditional natural dye valued for its high concentration of berberine, a naturally yellow plant alkaloid.

It produces particularly clear, luminous yellows on wool and silk, ranging from pale lemon to stronger golden shades. Iron shifts the colour towards muted mustard, olive and earthy green.

Choose cut root bark for a traditional, easily strained extraction or ground root bark for finer material with greater surface contact during extraction.

At a glance

• Botanical source: Berberis spp.

• Plant part: Root bark

• Available forms: Cut or ground

• Material: Raw botanical dye material

• Main colourant: Berberine and related plant alkaloids

• Natural colours: Clear lemon yellow to golden yellow

• With iron: Muted mustard, olive and earthy green

• Fibres: Particularly suited to wool and silk; cellulose fibres require suitable preparation

• Suggested quantity: Approximately 20–30% WOF for yellow

• Mordant: Not always required on protein fibres, but recommended for consistency

• Colourfastness: Poor to medium lightfastness; generally better washfastness when suitably applied

• Suitable for vegan projects: Yes

Choosing a form

Cut Barberry root bark

• Traditional cut botanical material

• Easy to contain and strain

• Suitable for overnight soaking and longer extraction

• May be extracted again to produce a paler second bath

Ground Barberry root bark

• Greater surface contact with the extraction water

• Convenient for quicker or more concentrated extraction

• Produces more sediment

• Best contained inside a fine cloth or dye bag

• Requires additional care to prevent airborne dust

How much to use

For a clear yellow, begin with:

20–30g Barberry root bark per 100g dry fibre

Equivalent to 20–30% WOF - weight of dry fibre.

Use less for pale lemon shades or increase the quantity when seeking a deeper golden yellow.

The result will depend on the form of the material, fibre, mordant, water chemistry, extraction method, temperature and dyeing time. Sample first when working towards a particular shade.

Basic dyeing guide

1. Prepare: Scour the fibre thoroughly. Mordant using a suitable method if desired, then wet the fibre before dyeing.

2. Soak: Cover the Barberry root bark with water and leave it to soak overnight. This is particularly helpful for the cut material.

3. Extract: Heat the soaked material and liquid gently at approximately 80–85°C for one hour. Vigorous boiling is unnecessary.

4. Strain: Strain the liquid through a cloth. Ground Barberry is best contained inside a fine cloth or dye bag.

5. Dye: Add the prepared fibre and hold the bath at approximately 80–85°C for one hour.

6. Cool: Allow the fibre to cool in the dye bath where practical. A longer steep may deepen the colour.

7. Finish: Remove the fibre, rinse thoroughly and wash gently.

For wool, an alum mordant may be used to improve consistency, or follow your preferred wool-mordanting method.

Dyeing cotton, linen or another cellulose fibre? Find a suitable mordanting method here.

Colour shifts with iron

Iron shifts Barberry yellow towards muted mustard, olive and earthy green.

Use iron sparingly. Approximately 1–3% WOF is generally sufficient when testing these darker shades.

We prefer iron acetate where possible because it is gentler on fibres than ferrous sulphate. Excessive iron may dull the colour, make protein fibres feel harsh and contribute to fibre damage over time.

Iron products and other modifiers are sold separately.

Tips from the dye pot

Colourfastness

Barberry can produce good washfastness when suitably prepared, dyed and finished, but its yellow berberine colour is sensitive to prolonged light exposure.

Lightfastness should be considered poor to medium, rather than excellent. Performance varies according to the fibre, mordant, depth of shade, dyeing method and aftercare.

Protect finished work from prolonged strong sunlight. Sampling and light testing are recommended for work intended for display or long-term use.

Storage and safe handling

• Store tightly sealed in a cool, dry place away from direct sunlight.

• For textile dyeing, paper dyeing and craft use only.

• Not for consumption or use in food, drinks, cosmetics or herbal preparations.

• Barberry root contains biologically active alkaloids, including berberine.

• Avoid creating or breathing dust, particularly when handling the ground form.

• Prevent contact with the eyes, mouth and open wounds.

• Avoid prolonged skin contact and wear gloves.

• Wear suitable particulate respiratory protection where dust cannot be adequately controlled.

• Follow the safety instructions for every mordant and modifier used.

• Use iron sparingly; excessive iron can damage fibres.

• Use dedicated dyeing utensils and containers—never food-preparation equipment.

• Keep away from food and out of reach of children and pets.

• For textile dyeing, paper dyeing and craft use only - not for consumption.

What you receive

Your chosen net weight of cut or ground Barberry root bark, supplied in a pouch.

Select the required form and pack size from the available options.

Mordants, iron and other dyeing supplies are sold separately.

Packaging

We pack as sustainably as we can while protecting your dye materials. Pouch types may vary according to pack size and the availability of our preferred lower-impact options.

Display jars and other photographic props are not included.

Learn with us

Join The Natural Dyers & Growers Academy to share your results and explore natural colour alongside fellow dyers and dye-plant growers.