Dyeing Red-Orange with Bloodroot — The Sacred Dye of Pre-Columbian America

Bloodroot (Sanguinaria canadensis) is a spring-flowering woodland plant native to eastern North America. Its rhizome exudes a vivid red-orange sap when cut — a dramatic visual that gave the plant its common name and made it unmistakable to Indigenous peoples across the continent. The root contains sanguinarine and chelerythrine, benzophenanthridine alkaloids that produce intense red-orange pigment. Indigenous nations including the Ojibwe, Cherokee, Haudenosaunee (Iroquois), and Lenape used bloodroot extensively as a body paint, textile dye, and medicine for centuries before European contact.

As a textile dye, bloodroot produces a warm red-orange on protein fibres (wool, silk) with alum mordanting. The colour is vivid when fresh but has only moderate lightfastness — similar to safflower or annatto. Indigenous dyers used bloodroot primarily on animal hides, quillwork, and bast fibres (inner bark, basswood), where the colour was protected from prolonged sunlight. The root was also mixed with bear grease or animal fat as a body paint that doubled as insect repellent.

SAFETY WARNING: Sanguinarine is a toxic alkaloid. It causes severe skin irritation on contact in sensitive individuals, and is toxic if ingested. The fresh root sap stains skin intensely and can cause chemical burns with prolonged exposure. Always wear gloves when handling bloodroot. Work in a well-ventilated area. Never ingest any part of the plant. Keep away from eyes and mucous membranes. Despite its toxicity, sanguinarine is used in regulated doses in some commercial toothpastes and mouthwashes for its antimicrobial properties — but the concentrated root sap is far stronger than these diluted products.