New indigo dye means 'aniline-free' denim

Indigo dyeing of cellulose electrospun nanofibrous mats

Archroma reveals aniline-free denim indigo dye

Indigo genes dyeing to make jeans cleaner and greener, Research

A Blueprint for Transforming Indigos to Photoresponsive Molecular Tools - Huang - 2023 - Chemistry – A European Journal - Wiley Online Library

A Case for Natural Indigo – Denim Dudes

Denim Today December 2018 by Textile Today - Issuu

IttyBittyGreenie (@ittybittygreeni) / X

Influence of various oxidation parameter(s) for natural indigo dye formation from Indigofera tinctoria L. biomass - ScienceDirect

Bluesign Targets Aniline in 2021 Chemical Substance List Revisions – Sourcing Journal

The Art of Treating Indigo Denim Stains On Your Sneakers - Sneaker Freaker

What is indigo? Denim FAQ answered by Denimhunters