"The three plants form the basis for primary colors. They were often combined to make other shades like green, orange, purple, and even black." ...

When it comes to what we eat, it’s not just a matter of taste. What food and drink look like, the colors we see, have ...

botany and chemistry of the plant and the dye, and the object of the paper was to place on record information as to the technology and the cost of the preparation of woad. Fortunately, on farms at ...

woad offered blue and yellow was derived from weld. Plants were soaked in hot water and wool was immersed in the dye bath. Stale urine may have been used as a mordant to fix dyes. Diodorus Siculus ...

A food dye that gives candy, frosting, cookies and even some ingested medications their cherry-red color is banned in the U.S., including several products branded for Valentine's Day. The FDA ...