Tannin Rainbow Online workshop with Kathy Hattori Online workshop held on Saturday January 18, 2025 10AM-1PM Pacific The workshop will be recorded and available for 120 days after purchase. Learn how to create striking color gradations using our pre-mordanted cotton fabric fat quarters, natural dyes, indigo and a few surprises. Tannins are a bitter and astringent compound found so abundantly in many plants.  In food, they serve as the slight pucker in black coffee and tea, and the “oaky” flavor in aged wines. Tannins are used in medicine and for leather tanning.  For us, they are the natural dyer’s not-so-secret-weapon ... Read more