How China Makes The World's Most Expensive Fabrics

Xiangyunsha silk gets its rust color from a dyeing process that layers river mud and a local yam extract over the fabric, a technique artisan Liang Zhu still practices and teaches by hand. The film treats the dyeing steps as the real subject, more than the finished cloth.

Why it's free: Free on Great Big Story's own channel; GBS produced and posted it there itself.