The advent of photojournalism in newspapers and magazines in the late 19th century allowed images to be reproduced affordably through advances in technology. Before then, engraving photographs was too expensive and time-consuming. Pioneering photojournalists in the 1890s helped establish the field by covering temporary events, though profits initially came only from original prints. The years from 1890 to World War I saw photojournalism become established through the rise of press photographers and news imagery in publications.