Seedhead of Chinese woad

Seedhead of Chinese woad

C010/9819 Rights Managed

Request low-res file

530 pixels on longest edge, unwatermarked

Request/Download high-res file

Uncompressed file size: 51.7MB

Downloadable file size: 4.1MB

Price image Pricing

Please login to use the price calculator


Credit: DR JEREMY BURGESS/SCIENCE PHOTO LIBRARY

Caption: Part of a mature seed-bearing raceme of Chinese Woad, Isatis indigotica, a member of the Cruciferae ( cabbage ) family. Woad ( in Europe, I. tinctoria ) has been a source of blue dye for thousands of years. Traditionally, the dye was made by soaking chopped up plant material to soften the tissue, then fermenting the mass in vats, followed by treatment with urine. This produces the soluble form of the dye - “white indigo”. Cotton, wool and silk treated with white indigo in solution turn blue on exposure to air. The most familiar use of indigo today is to dye denim for jeans. Due to the polluting nature of chemical synthesis of indigo, the use of Isatis spp. to produce the dye is increasing.

Release details: Model release not required. Property release not required.

Keywords: chinese woad, cruciferae, denim jeans, dye, indigo, isatis indigotica, isatis tinctoria, woad

Licence fees: A licence fee will be charged for any media (low or high resolution) used in your project.