Does Tufenkian use vegetable dyes?

We use vegetable dyes only with Yak-Soo, a shag alternative and Tufenkian construction technique. Otherwise, vegetable dyes do not offer enough range of color for all of our designs and exhibit lack of color-fastness both in washing and exposure to sunlight. Tufenkian was one of the first manufacturers to switch to top-quality Swiss metal-complex dyes, which provide a wide range of fade-resistant colors. The wool is still dyed in small lots by hand, in the Tibetan tradition, but the pigments are created with a modern Swiss process utilizing chromium metal, a naturally occurring element, the use of which creates dyes that will never run or fade, while allowing the natural character of the wool to express itself.