I learn so much from my readers! The idea for today’s post came from one of my most recent followers, new blogger, Dhwani Ghandi, of Style Green With Dee. 

The fashion industry is known to be one of the world’s worst polluters. According to the United Nations, it is responsible for producing 20% of global waste-water and 10% of carbon emissions, more than that of international flights and maritime shipping combined. Clearly, there is an urgent need for more sustainable, eco-friendly alternatives. Could milk protein (casein) be one of them? 

The idea isn’t a new one. In fact, fabric made from sour milk was developed as a substitute for wool in resource-starved Italy in the 1930s and was used in many clothing and household items in America and Europe during the ’30s and ’40s. It was far from perfect, however. Chemicals such as formaldehyde were used to strength the fabric and it wasn’t as soft or durable as wool. As a result, it fell into obscurity when less expensive, more resistant synthetic options such as nylon became available. 

Today, milk fibre is once again gaining interest as manufacturers and consumers look for alternatives to synthetic fabrics. Most milk fibres today are blended with the chemical binder acrylonitrile, which is also used to make acrylic, but there are some small producers in Europe who claim that their fabrics are 100% chemical-free. At this point, they have a limited market due to cost. Milk fibre is much more expensive than polyester to produce, but cheaper than other luxury fibres like silk. 

So what is casein or milk fibre fabric like? Apparently, it is glossy and luxurious in appearance, feels much like silk, absorbs moisture well, and is antibacterial and antifungal. It blends well with other fabrics such as cotton, bamboo, and modal. What’s not to like? 

I have to wonder though, if solving one problem would cause or contribute to another. Apparently, the dairy industry worldwide dumps millions of tons of milk every year. It would be wonderful to see that go to good use in fabric production. Would it be enough, however, or would dairy herds have to be increased in order to meet the demand? It takes approximately 15 kg (33 lb) of milk to produce 1 kg (2.2 lb) of milk fibre. The amount of land and water required to raise additional cows, the unethical treatment of factory-farmed animals, and pollution caused by manure entering waterways are all factors that would have to be taken into consideration. And then there are those cow farts putting methane gas into the atmosphere! 

Who knows though? It may be a novel idea now, but maybe someday we’ll all be wearing sour milk!