Weld (Reseda Luteola) Organic Powder

$8.90

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Also known as dyer’s weld, dyer’s rocket, and dyer’s mignonette.

Weld (Reseda Luteola), is one of the oldest and most reliable natural yellow dyes in the world. Used across Europe and the Middle East since antiquity, weld is renowned for its brilliance, efficiency, and exceptional lightfastness. From sunny pale yellows to deep golden hues, weld has colored everything from medieval tapestries to 18th-century silks, and remains one of the clearest sources of yellow available to natural dyers today.

Our Weld Powder is carefully produced from Reseda plants selected for their high concentration of luteolin, the key yellow dye molecule. Weld is certified under the Global Organic Textile Standard (GOTS) for use on organic fibers. Weld is also prized for mixing with indigo to create emerald and leafy greens.

Active dye components: luteolin (flavonoid)
CI Natural Yellow 2

Shading Tips

Alum (protein or cellulose): bright, clear yellows
Tannin + aluminum acetate: strong golden shades on cellulose
Copper (5%): deeper mustard yellow
Iron (1%): khaki greens and olive tones
Overdye with indigo: brilliant greens, from emerald to leaf tones
Slightly hard water enhances color; add chalk to brighten if water is soft

Instructions for Dyeing with Weld

Dosage

10% WOF → light, bright yellow
20–50% WOF → deep, saturated yellows
Traditional recipes: up to 80% WOF, but the bath can be reused for lighter shades.

Mordanting

Protein fibres (wool, silk): alum at 15% WOF
Cellulose fibres (cotton, linen): tannin + aluminium acetate, or aluminium triformate

Prepare the dye bath

Dissolve weld powder in hot water.
Simmer gently to extract the colour.

Dyeing

Add mordanted, pre-wetted textiles to the bath.
Stir gently for even absorption.
Maintain a simmer (not a boil) for 30–60 minutes, depending on depth of shade desired.

Finish