pigment

All-natural blue pigment found in red cabbage could replace artificial food coloring dye 

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Blue is the world’s most popular color but the hue rarely appears in nature, so manufacturers have had to resort to artificial dyes and chemicals to create blue food. That could soon change, now that a naturally occurring blue pigment has been discovered in red cabbage. Scientists with the Mars candy corporation found traces of … Read more

Blue pigment popular with Renaissance artists gets ‘sick’ 

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A pigment that was popular with Renaissance artists develops a wasting disease over time that causes blue parts of historical masterpieces to turn grey, scientists say. The costly pigment ‘ultramarine’, made from a dazzling blue metamorphic rock, catalyses its own chemical reaction that reduces colour intensity. This affects legendary paintings including Johannes Vermeer’s ‘A Young … Read more