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. (…)

tags: Macho com Macho 3,

from: https://libster160.tumblr.com/post/102035780050