New indigo dye means 'aniline-free' denim

Quantification of aniline and N-methylaniline in indigo

Indigo dye - Wikipedia

Critical Review on Sustainability in Denim: A Step toward Sustainable Production and Consumption of Denim

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Indigo dyeing of cellulose electrospun nanofibrous mats

Dyeing - Archroma

Microbial Synthesis of Indigo

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Highly Soluble Indigo Derivatives as Practical Diesel Absorption Markers

A RECIPE FOR INDIGO DYE [DIY TUTORIAL] – Chloe Mullaney

Indigo dyeing of cellulose electrospun nanofibrous mats

Aniline-free indigo solution for Absolute Denim