Egyptian cosmetics.. and crystallography！ Objects found in ancient burial sites are often made up of crystallized chemical materials.These crystals are,for those who know how to 'read them',real archives. The first chemical solution synthesis Egyptian make up, invented by Man knowledge from crystals Researchers have shown that these crystals are rare The use of kohl,black eye makeup,is recorded from chlorinated compounds of lead.The synthesis method ancient Egypt.Analysis of cosmetic powders taken (in aqueous media)can be found in Greco-Roman from funerary objects preserved in the Louvre texts.These texts reveal that the artificial white Museum,has identified the major component of precipitates were highly valued for their medicinal these old cosmetics as a crystalline lead ore,galena properties,especally for the eyes.The ancient (PbS)but also.the presence of far rarer crystals... Egyptians were thus the first to use soft chemistry to develop cosmetic products to protect them from eye infections,common in the hot and humid climates along the Nile..the cradle of their civilization. dehe 5355 Reconstituted preparation,by using galena (PbS)litharge (Pbo)gemmed salt (NaCl)and water (H20).then byaddingnatron (Na203)toobtain laurionite (PbOHCl) and phosgenite (Pb2C12C03)LC2RMF-CNRS Le Louvre