Scanned from a 6x6 transparency from the year 1970
I quote Howard G. Charing :
All the textile painting, embroidery, and artisan craft is carried out by the women. From a young age the Shipibo females are initiated by their mothers and grandmothers into this practice. The Shipibo designs are traditionally carried out on natural un-dyed cotton (which they often grow themselves) or on cotton dyed in mahogany bark (usually three or four times) which gives the distinctive brown colour. They paint either using a pointed piece of chonta (bamboo) or an iron nail with the juice of the crushed Huito (Genipa americana) berry fruits which turns into a blue- brown-black dye once exposed to air.