International Molders and Foundry Workers Union of North America

In the years prior to the American Civil War existing organization of workers in the iron industry was established on the basis of independent local groups.The first national convention was attended by 35 delegates, representing local iron molders organizations located throughout the Northeast and as far west as St.[2] The Molders' Union initially took the form of a loose federation of already existing local organizations, each retaining almost complete autonomy.This proved insufficient and in 1860 per capita dues were initiated at the rate of 5 cents per member per year.[4] The organization grew rapidly during the years of the Civil War, with non-union journeymen joining in great numbers.
Glass, Molders, Pottery, Plastics & Allied Workers' International UnionUnited States of AmericaCanadian Association of Industrial Mechanical and Allied WorkersAFL–CIOtrade unionwrought ironGMP International UnionAmerican Civil WarPhiladelphiaMissouriWilliam H. SylvisPennsylvaniafederationjourneymenGlass, Pottery, Plastics and Allied Workers International UnionGlass, Molders, Pottery, Plastics and Allied Workers International UnionMartin FoxJoseph F. Valentine