 By 1925, the federation had 17 affiliates, with a total of 79,800 members, dropping to 42,072 in 1935.At this point, its largest affiliate was the British National Union of Printing, Bookbinding and Paper Workers, with other affiliates in Belgium, Czechoslovakia, Denmark, Hungary, Finland, France, Norway, the Netherlands, Sweden, Switzerland and Yugoslavia.In 1939, the federation agreed to merge with the Lithographers' International and the International Typographers' Secretariat.