Sep-21-15
Using genetic engineering, the Bolts Threads startup has developed a way to spin synthetic spider silk on the large scale—opening the door to a range of durable, petroleum-free fabrics.
The silk made by the Bolt Thread’s team starts out a lot like beer, mostly consisting of sugar, water, salts and yeast mixed into a liquid silk protein. This protein is spun through a wet spinning process to create a fiber that the team claims has the same chemistry as natural animal silk. The bio-engineered silk can be fine-tuned to suit different needs, and do not require the same special care as regular silks.
Image: Part of the fiber-making apparatus. During the spinning process, fibers are extruded from a solution of protein, run through baths, and dried.
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