In 1919 Collier announced a new binding material for The Harvard Classic sets with the printing of a new set called the Southwark edition (in flexible dark green fabrikoid or imitation leather). The first set of the Southwark edition was printed in July 1919 and given to the Du Pont company. The set carries an inscription "This is the first set of Harvard Classics published by P.F. Collier & Son Company to be bound in DuPont Fabrikoid...". The set was named after the birthplace of one of the founders of Harvard College, John Harvard, who was born in London Borough of Southwark. The set is often referred to as the "Veritas" edition; however, the "Veritas" edition is bound in a dark crimson color promoted by DuPont. The new binding material, called fabrikoid, offered less weight, flexible boards, and bindings that were more durable than the cloth or leather bindings of the early editions. Fabrikoid bindings were used in editions published from the 1920s to 1950's such as the varicolored Gemston edition which has five different colors of bindings and for larger editions with increased font sizes called the (home) Library editions that were marketed as being easier to read.