10 EGYPTIAN BLUE … is the world’s oldest manmade pigment. And its recipe is so complex that it was lost for 1,500 years, from ancient Roman times till the 19th century. (…)
10 EGYPTIAN BLUE … is the world’s oldest manmade pigment. And its recipe is so complex that it was lost for 1,500 years, from ancient Roman times till the 19th century. (…)
