vulcanized

Updated: June 26, 2025

While still on the last, they are dipped into a tank of varnish and vulcanized a very simple matter now that Goodyear has shown us how, for they are merely left in large, thoroughly heated ovens for eight or ten hours. The rubber shoe or boot is now elastic, strong, waterproof, ready for any temperature, and so firmly cemented together with rubber cement that it is practically all in one piece.

Eva March Tappan - Makers of Many Things