Comprehensive Fiber Understanding
Learn how plant-based fibers react to tannins and metals, and the significance of mordanting.
Ancient Dyeing Philosophies Revealed
Explore the Indian and Egyptian methods of creating and respecting affinity in dyeing practices.
Practical Mordanting Techniques
Get hands-on with mordanting cotton, linen, silk, and wool, mastering pH levels and sustainable practices.
Master the Art of Mordanting with Michel Garcia
Mordants: Creating or Respecting Affinity Instructor: Michel Garcia 📽 3,5 hours of video | 🎙 Narration in English | 🌍 Subtitles in 6 languages | 📄 Handout in 6 languages What truly makes natural dyes bond with fabric? In this profound and essential tutorial, master dyer and chemist Michel Garcia guides us through one of the most important — yet misunderstood — areas of dyeing: mordanting. This is not just about recipes. It’s about understanding the structure of fibers, the chemistry of tannins and metallic salts, and the philosophies behind different global traditions of dye preparation. This is the second course in the “From Plant to Dye” series, and it forms the cornerstone of all textile dyeing practices that involve mordant dyes — especially for cellulose, silk, and wool. 🌿 What You Will Learn The nature and structure of plant-based fibers and how they react to tannins and metals. The role of tannins as natural complexing agents for aluminum salts — and how this mirrors the natural world. Two radically different dyeing philosophies: Creating Affinity (the Indian method): Grafting tannin onto cellulose to create a dyeable substrate. Respecting Affinity (the Egyptian method): Using salts that already have a natural attraction to the fiber. Practical demonstrations of how to mordant cotton, linen, silk, and wool. The importance of pH, timing, and drying for successful mordant fixation. How aluminum acetate, potassium alum, and other salts behave differently — and how to choose wisely. Eco-conscious practices: how understanding affinity can lead to less water waste and more sustainable mordanting. 🌏 Why This Course Matters Michel doesn’t just teach techniques — he opens doors to ancient dyeing traditions, from India to Egypt, and from West Africa to China. He explains how historical dyers intuitively mimicked natural plant chemistry, using green methods that are just as relevant today. By the end of this course, you won’t just follow steps — you’ll understand why they work, and how to adjust them to your needs, your fabrics, and your ethical concerns. “Once you understand how to create affinity between fiber and dye, you gain full control. No more dumping mordant baths. No more weak colors. Just brilliance — and sustainability.” — Michel Garcia This course is a must for anyone serious about natural dyeing — whether you're a beginner searching for clarity, or a professional looking to deepen your practice.

About Michel Garcia
Botanist • Chemist • Natural Dye Visionary Michel Garcia is one of the world’s most respected voices in the field of natural dyeing, known for blending deep scientific knowledge with a reverence for traditional craft. Originally trained in both botany and chemistry, Michel has spent decades studying how plants and minerals interact with fibers — work that forms the very heart of mordanting. In this course, Michel draws from his vast experience with global dye traditions, especially those of India, Egypt, and Europe, to explain how we can either create or respect affinity between dye and fiber. His passion for sustainability, combined with his gift for demystifying complex processes, has inspired a new generation of conscious dyers worldwide. Michel is the founder of Plantes & Couleurs, and continues to research, teach, and garden in Le Faouët, Brittany, where science, nature, and color meet in every workshop he leads.
Course Curriculum
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1
About this Tutorial. Handouts
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About this course
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Handouts for Download
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2
The Nature of Fibers: Chemistry and Physics of Wool, Silk, and Cellulose
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Michel about Wool, Silk and Cellulose
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Chemistry of Fibers
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Physics of Fibers
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Summary for the Dyer
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Scouring Fabric and Yarn (files for download)
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3
Understanding the mordanting process: Aluminum
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Let's summarize
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Preparation of AlAc, 3 methods. Demo
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Demo Testing AlAc mordants
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Aluminum Hydroxide and Lake Pigment
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Aluminum Acetate for Plain Dyes
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Selective discharge of mordants
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Recipes for Aluminum Mordanting of Animal and Plant Fibers
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4
Iron comes in play: Iron, Aluminum-Iron mordanting
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Aluminum and Iron II
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Recipes
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5
Creating Affinity or Respecting Affinity?
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A Story about Tannins
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Red tannins
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6
Traditional Dyeing Techniques
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Bogolanfini
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Bogolan II
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Guandon Silk, Chinese Tradition
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Shipibo Style
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Industrial Era
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7
One-bath Technique for Wool and Silk
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One-Bath Technique Basics
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One-bath Technique for Wool
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One-bath Technique for Silk
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Recipes
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8
The Garden of Forking Paths
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The Garden of Forking Paths
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9
Green Chemistry and Sustainability
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Legacy from the Dyers of the Past
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Earth Crust: Chemistry and Ethics
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Bioaccumulators of Aluminum
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Label for Ecological Textiles
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Sustainability
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What People are Saying
What Our Students Say About This Eye-Opening Journey into the Science of Natural Dyeing
"I’ve tried to understand mordanting for years, and it always felt like alchemy — mysterious and vague. Michel Garcia’s course was a revelation. For the first time, I feel like I actually understand what’s happening inside the fiber and why certain combinations work or fail. His way of explaining tannins and their role in dyeing opened my eyes completely. I now work with much more confidence, and the results speak for themselves."
Italy
"I attended one of Michel’s live workshops years ago, but this online course gave me even more. It’s dense, yes — you have to concentrate — but that’s because it’s real knowledge. He connects traditional wisdom with chemical insight in a way no one else does. The parts about ‘creating affinity’ changed how I approach my entire dyeing process. I’ll be rewatching this again and again."
UK
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