Murex trunculus sea snails have been the source of one of the world’s most precious dyes for millennia. Harvested by hand along rocky Mediterranean coastlines, these snails contain a small hypobranchial gland that produces a remarkable dyestuff.

The glands used for dyeing are a by-product of snails eaten locally as a fried seafood delicacy. The tiny glands are carefully removed, dried, and ground to preserve the precious dye precursors they contain.

From this extraordinary source come Tyrian purple and tekhelet blue, two legendary colors of antiquity associated with royal garments, sacred textiles, and priestly traditions throughout the Mediterranean world.

Like indigo, murex dyes require a reduced vat to develop their color. During dyeing the material first appears greenish in the vat, then develops its characteristic purple or blue tones through oxidation in air.

Under typical conditions:

• Wool develops rich purple shades

• Silk often shifts toward brilliant blue tones

Supplied in small research quantities due to the rarity of the material.

Active dye components

6,6′-dibromoindigo (dibromoindigotin)
indigotin derivatives

CI Natural Violet 1

Shading tips

• Wool: reduced vat produces deep purples

• Silk: reduced vat often produces clear blues

• Light modifiers: can shift tones between violet, indigo-blue, and reddish purple

• Multiple dips: increase depth and richness of shade

As with indigo, vat chemistry and reduction conditions strongly influence the final color.

Usage guidance

Due to the small amount of pigment naturally present in the glands, this material is intended for sample dyeing and experimental work, not for piece dyeing of large textiles.

A 5 g portion typically dyes approximately:

• 10–25 g of fiber for strong shades

• 25–60 g of fiber for lighter lavender tones

Results vary depending on vat chemistry, species variation, and dyeing method.

For best results, dye small skeins or swatches rather than large pieces.