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Harvesting Indigo Leaves
Indigo leaves are typically harvested when they are rich in pigment, usually during the plant's flowering stage.
Fermentation
The harvested leaves undergo a fermentation process to release the indigo pigment. This involves placing the leaves in a vat of water and allowing them to ferment over a period of time.
Extraction of Indigo Paste
After fermentation, the water is drained, leaving behind a greenish-blue sludge. This sludge is then processed to extract the indigo pigment.
Creating the Dye Bath
The extracted indigo pigment is mixed with a base (usually lime) and other natural ingredients to create the dye bath. The bath is stirred to activate the indigo and produce a frothy, oxygenated surface.
Preparation of Yarn/Fabric
The fabric to be dyed is soaked in water to ensure even absorption of the indigo dye. Wet fabric allows the dye to penetrate more effectively.
Dipping and Oxidation
The fabric is immersed into the indigo dye bath, and upon removal, it initially appears green. However, as it reacts with oxygen in the air, it transforms into the classic indigo blue. This oxidation process is key to achieving the desired color.
Repeat Dipping
Achieving a rich indigo hue often requires multiple dips, with periods of oxidation between each immersion. The fabric is dipped, allowed to oxidize, and then re-dipped until the desired depth of color is achieved.
Rinsing and Drying
Once the fabric reaches the desired shade, it is rinsed thoroughly to
remove excess dye. After rinsing, the fabric is left to dry in the open air,
revealing the final, beautifully indigo-dyed piece.
