Filtration & Drying
Wash away impurities. Clean the mud using diluted white distilled vinegar (mixed with water). Repeat this rinsing process multiple times to remove lime residue and other impurities. Dry until thick and sticky when the mud is a dense, peanut butter-like consistency or is easy to transfer to your preferred drying method. Thoroughly dehydrate. Let the paste dry for a few hours using a dehydrator or in indirect sunlight until it becomes firm and completely dried into cakes. Spread onto a stainless-steel tray and transfer to a drying oven. Dry at low heat, below 110°F, for the best results. Store or process the dried indigo. You can keep the dried indigo in a dry, airtight container or grind them into a fine powder using a coffee grinder or mortar and pestle for easier use later. Optional: Use wet mud directly in vats. For dyers using organic indigo vats, the wet mud can be advantageous since it reduces. Be sure to store it in an airtight container filled to the top to minimize air exposure.
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