National Geographic : 1938 Feb
Photograph by Pierre Verger from Black Star BLACK PAINT CAMOUFLAGES A NANKING HOTEL AS AIR RAIDS THREATEN Workmen coat the dazzling cement walls of the Metropolitan, one of the capital's newest hostelries, making it lessconspicuous both byday and bynight. The artof concealment by coloring or screening, which gained impetus during the World War, has been carried to great lengthsduring thehostilities inChina. Trees, artificial and natural shrubbery, and other materials hide troops of both sides, at the front and in the rear. Roadways and camps arekept from sight bysimilar methods.