Coal-tar colors used in food products
A 1912 Washington government printing office publication by Bernhard Conrad Hesse on coal-tar dyes used to colour food, written for regulators and food chemists of the United States Department of Agriculture. The single picture is the department's circular seal, showing a sheaf of maize, a plough and a spade within a rope border, with the words 'Agriculture' and 'Commerce' and 'The Foundation of Manufacture' on a ribbon below. A designer might take from it a dignified federal emblem style, with stippled background dots, rope-edged roundel and ribbon lettering for official or heritage-themed work.
