![]() ![]() Upon reviewing the data, she concluded that the effluent produced from the BioBlue process contains less salt and results in a considerably lower chemical oxygen demand (COD) and biochemical oxygen demand (BOD) than the incumbent process that used sodium hydrosulfite. “Some of the compounds, including salts, coupled with the high PH required in dyeing, contaminate the environment if the effluent is not treated.” “It is no secret that sodium hydrosulfite is environmentally unfavorable because it produces hazardous effluent that must be treated prior to discharge,” Cattermole said. Cattermole, an expert in both sustainability and textile chemical management with more than 30 years of experience in denim innovation and textiles, confirmed that BioBlue was a more environmentally friendly way of reducing indigo without using sodium hydrosulfite. To validate its in-house findings on BioBlue Indigo, Advance Denim turned to Amanda Cattermole of chemical management consultancy Cattermole Consulting Inc. BioBlue Denim is a cleaner way to reduce indigo and prevent sustainable fibers from being dyed with hazardous chemicals. She sought to use less water, energy and chemicals during dyeing, and also clean up the chemicals that were currently used to dye indigo.Īdditionally, since Advance Denim was investing in eco-friendly materials such as recycled fibers, Tencel and organic cotton, the company realized it didn’t make sense to bathe those fibers in toxic chemicals during the indigo dye process. Textil Santanderina Bows Low-Impact Black Denim Fabricsīut Amy Wang, the general manager of Advance Denim, wanted to go a step further. The company also increased its Higg carbon footprint verification score from 49 to 81 in just a two-year span. Since 2018, the denim manufacturer has reduced energy consumption per yard of fabric by 42 percent and cut water consumption 58 percent. Using this chemical, sulfates can build up in the wastewater, and at high enough levels, release harmful gases that could cause further environmental damage.īioBlue Indigo is the latest of Advance Denim’s sustainability success stories. ![]() Sodium hydrosulfite forms a high concentration of salts in the denim manufacturing process, and they are hard to remove from wastewater and damaging to the environment. In 2021, the denim manufacturer released its most eco-friendly dyeing process yet after three years of constant experimentation and innovation.īioBlue Indigo is designed to reduce the harmful chemicals that pollute wastewater after the denim dyeing process.īut how does it work? BioBlue’s indigo dyeing process changes the indigo dyes from powder to liquid form without using sodium hydrosulfite, an unstable, flammable chemical that can be difficult to transport. You can also dye much much more fibre than shown in the photos.Advance Denim’s aggressive investment in sustainable production is paying off. They are there to show you what colours you can expect to achieve with the dye. Please note that the dyed fibres in the photos are not included. The kit also includes comprehensive instructions on how to create and use the vat. A small amount of synthetic fibre content such as 5% spandex in a garment, or 5% nylon in a sock yarn, is no problem. You can dye fabric, yarn, garments, wood, anything that you like, and any fibre, such as cotton, linen, wool, silk, bamboo, rayon, hemp, etc. Indigo can be used to dye any natural fibres, not synthetics. The vat can remain active for several weeks, depending on how much you use it. But it will dye a lot! As a general ballpark, you could expect to dye at least 5 yards of a medium weight cotton such as a quilting cotton, to a medium blue, and probably more, and darker if you wish. This kit contains the pre-measured ingredients to create one organic fructose vat, with which you can dye quite a bit of fibre - how much a kit will dye depends on a few things, including how dark you want the blue to be, and what fibres you use. Indigo cannot be dyed in the same way as other dyes, but must be used to create a "living" vat, which is achieved through a sort of fermentation process. A magical dyestuff that has been used around the world as a dye since pre-historic times, the culture and wonder that surrounds this plant is immense. ![]() Indigo (indigofera tinctoria) species are the world's only source of natural, true, colourfast blue. ![]()
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