Tintura de Jenipapo — Azul-Negro dos Povos Indígenas

Harvest green and immature genipap fruits (Genipa americana). The ripe fruit is edible, but has much less genipin — the active compound. The fruit should be hard and dark green.

Cut the fruits in half and squeeze or grate to extract the juice. Wear gloves — the juice stains any surface intensely. The liquid will be almost colorless to pale green.

Pass the juice through a fine sieve or cloth to remove pulp and seeds. The filtered liquid is your genipa ink.

For body painting: apply the juice directly to clean skin using fingers, sticks or brushes. The Kayapó create geometric patterns representing animals and spirits. The juice is almost invisible when applying.

Genipin in the juice reacts with amino acids in skin proteins in the presence of oxygen. In 2-4 hours, the mark begins to darken. Full color in 24-48 hours — a deep blue-black.

The genipap mark lasts 1-2 weeks, disappearing naturally as the epidermis renews itself. It cannot be removed with water or soap — it is a covalent bond with skin proteins.

To dye fabrics: works best on protein fibers (wool, silk) because genipin naturally binds to amino acids. For cotton, first treat with tannin to create binding points.

Se estiver usando algodão ou linho: dissolva tanino (8% do peso da fibra) em água quente, mergulhe a fibra por 1 hora. Depois mordentear com alúmen (12% do peso). Para lã/seda, este passo é opcional.

Immerse the prepared fiber in genipap juice. It is not necessary to heat — the reaction occurs at room temperature. Leave submerged for 2-4 hours.

Remove the fiber from the bath and hang to air dry. The color develops during drying as the genipin oxidizes. Wait 24-48 hours for full color.

Após a oxidação completa, enxágue suavemente em água fria. O resultado em lã/seda é azul intenso com leve tom violeta. Em algodão com mordente, tons mais claros de azul.

In Kayapó tradition, genipap (black) and urucum (red) are the two fundamental colors of body painting. Black represents wisdom and connection with spirits; red, vital force and readiness for war. Together, they express the duality of the Kayapó worldview.