Those of us who used to receive the "Blackhawk Bulletin," a monthly catalogue of movies offered for sale by Blackhawk Films, will remember ads for the serial Wolves of Kultur, starring Leah Baird. "What Does Kultur Mean?" asks this ad. "Kultur" is German for "Culture." One of the war aims of the German Empire was to spread its culture.
Moving Picture World, 19-October-1918
Notice that the producers or the distributor went to the expense of printing the ads on yellow paper.