SKU: 21034659521

Natural Indigo Powder for Textile Dyeing - Indigofera longeracemosa

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Description

Natural Indigo Powder for Textile Dyeing - Indigofera longeracemosaNatural Indigo Powder Sumatra Indigo This is a rare natural indigo powder from Sumatra, made from Indigofera longeracemosa, a lesser known indigo species valued for its strong blue pigment. Unlike cheap indigo powder sold for hair coloring, this is a textile dye prepared for vat dyeing. Use it to create clear blues on wool, silk, cotton, linen, and other natural fibers. Like all indigo, it does not need a mordant. It must be used in an indigo vat with

Natural Indigo Powder – Sumatra Indigo

This is a rare natural indigo powder from Sumatra, made from Indigofera longeracemosa, a lesser-known indigo species valued for its strong blue pigment. Unlike cheap “indigo powder” sold for hair coloring, this is a textile dye prepared for vat dyeing.

Use it to create clear blues on wool, silk, cotton, linen, and other natural fibers. Like all indigo, it does not need a mordant. It must be used in an indigo vat with an alkali and a reducer, where the blue pigment is temporarily made soluble so it can enter the fiber.

Our Sumatra indigo comes from a small family-run farm in Indonesia, where the plants are grown without pesticides and processed by traditional alkaline extraction. It is suitable for fructose vats, iron vats, hydros/thiourea dioxide vats, fermentation vats, and other standard indigo methods.

Why choose this indigo?

  • Made from Indigofera longeracemosa
  • No mordant required
  • Suitable for wool, silk, cotton, linen, hemp, and blends
  • Builds from pale sky blue to deep navy through repeated dips
  • Can be overdyed with weld, fustic, madder, cochineal, or tannins for greens, purples, teals, greys, and complex layered shades

How much do I need?

As a rough guide:

  • 1–2 g per 100 g fiber: pale blues
  • 4–6 g per 100 g fiber: medium blues
  • 10–12 g+ per 100 g fiber: deep blues and navy, built with multiple dips

Final depth depends on your vat strength, fiber preparation, number of dips, oxidation time, and whether you are dyeing protein or cellulose fibers.

Important note

Indigo is not used like most natural dyes. You cannot simply simmer it with fabric. It needs a vat with an alkali and a reducer. For beginners, choose the complete indigo kit or follow our step-by-step indigo vat instructions.

New to indigo? Start with 50 g. It gives you enough material to learn the vat properly without running out halfway through.

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SKU: 21034659521

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Martin Southard
Port Orchard, US
★★★★★ 4
World War II - The Final Months
Format: Hardcover
The book takes you through the final months of World War II, focusing on eight key moments when the fighting finally came to an end. It’s not just a dry rundown of facts or battle maps — the authors do a great job of bringing the people involved to life, from famous leaders to everyday soldiers and civilians caught in the chaos. What I really liked was how the story moves around the globe, covering Europe, the Pacific, and beyond. It keeps the narrative fresh and exciting, giving a real sense of how the war unfolded on many fronts at once. Sometimes I had to pay close attention to keep up with all the locations and characters, but that only added to the feeling of being caught up in a fast-moving, gripping story rather than a history lesson. What stood out most was how it made me feel the human side of history—the fear, the relief, and the confusion as the war finally ended. It’s full of details, but it never felt boring or too technical.
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Reviewed in the United States on October 19, 2025
C
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Christian Schlect
Carnegie, US
★★★★★ 5
The Fix
Format: Hardcover
An insightful and interesting book on how our country's first legislators try to make sense of the new and fairly short U.S. Constitution, which, being drafted by humans, was bound to be imperfect. A lack of clarity on some point might be due to the changeable nature of words themselves or to confusion or obscurity of thought by the authors. And, who were the authors? The men in the room who came up with the product or the various state conventions that approved the final product? Professor Gienapp writes well and with a fine grasp of his subject. He uses concrete examples to illustrate his main points. For example, Congressional debates over the constitutionality of a proposed federal bank, the ratification of Jay's Treaty, and even whether the Bill of Rights was to be incorporated into or simply added to the original document. Most people think of U.S. constitutional history in terms of its drafting and ratification and/or its later judicial interpretation by the Supreme Court. Here, Professor Gienapp focuses on the initial work of interpretation by the first few sessions of Congress. This book is essential reading for those interested in the U.S. Constitution and the internal architecture of our government. I think those who spend countless hours viewing frenetic talking heads say this or that about the constitutionality of some issue or another (or the nomination of a justice to the High Court) should throw their television set out the window and, instead, settle into a corner chair and calmly read this and other such thoughtful books. This one should win prizes.
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Reviewed in the United States on October 14, 2018
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Gadavis
Carnegie, US
★★★★★ 5
Excellent Book
Format: Hardcover
Stanford University History Professor Gienapp has done an outstanding job of researching and writing this historical analysis of the interpretation of the American Constitution by America's first Congress. Professor Gienapp analyzes data primarily from Congress's problems interpreting the removable of executive officers, chartering a national bank and approval of the 1794 Treaty with Great Britain negotiated by Chief Justice John Jay, the "Jay Treaty." Gienapp shows in clear writing how Congress used records of the debates at the Constitutional Convention and State Ratification Conventions to resolve these constitutional issues. I highly recommend this book to anyone concerned with the interpretation of the American Constitution.
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Reviewed in the United States on July 18, 2020
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Gary Y. Larsen
Bozeman, US
★★★★★ 5
An analysis of how we came to think about the Constitution the way we do
Format: Kindle
It provides a detailed analysis of the arguments used to talk about the Constitution in the ten years after it was ratified. These arguments shifted from treating it as a preliminary draft to be perfected through filling in the details of the operation of the government through experience, to a sacred document that had to be interpreted to determine its "true" meaning.
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Reviewed in the United States on December 18, 2018
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Connie Jones
Dallas, US
★★★★★ 5
Transcends the Historiography on the Constitution
Format: Hardcover
“This is the most important book to be written on the Constitution since Gordon Wood’s Creation.”
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Reviewed in the United States on May 9, 2020

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