Introduction: The color of Clausena lansium L. Skeels cv. Jixin fruit peel is brown (BP), while the mutant cv. Zijin had purple fruit peels (PP). The coloration of the peels was attributed to ...

This striking, vibrant color became the world’s first synthetic pigment, now known as Egyptian Blue. The Egyptians utilized this pigment extensively, applying it to a variety of materials such as ...

Known as “Egyptian Blue,” it’s among the oldest synthetic pigments in the world, with the newly found ingot weighing more than five pounds. Archaeologists excavating the Domus Aurea, ...