Filling vats with water and mysterious chemicals and dyes and treading with their feet in an ancient traditional tanning process for animal skins - time lapse

cow hide morocco labor worker pit industry vat dye marakech wash north africa fill africa tourism rinse argankernel cow soak difficult water tread hide people qasriya process animal travel chemical time lapse skin danger method old traditional leather man ancient technique attraction location feet person mysterious city vintage powder ash lime tanning