Convolute of badges of social grassroot movements from 1965-2003

In 1896, a US entrepreneur filed a patent for the production of buttons: a metal disc, a print, celluloid foil, a needle on the back. Being fast and cost-effective to produce, buttons worldwide became a medium of "pro" and "contra". The symbols, concepts or slogans were easy to memorize, provocative and promoted discussions. Since the mid-1960s grassroot movements in the Federal Republic used buttons in addition to leaflets to communicate their cause.