tannin mordants

Each week, we are emailed with questions from our natural dye community asking simple and complex questions that we thought might be worth sharing. Here are a handful from this week answered by natural dyer in chief, Kathy Hattori, Founder of Botanical Colors: Is there any way to remove iron from fabric to brighten it up? Iron is a reliably “permanent” mordant, which is why it is used to enhance light and “washfastness” with dyes that are weak in these categories. I have not seen a reversible method for removing iron. I keep getting mixed answers from people about dyeing … Read more