Research Notes

The development of permanent wave technology is often explained through machines and patents. However, a closer examination reveals that the decisive factor was not only mechanical innovation — but the method of winding the hair itself. Archival material (ref. 10733–10740) provides rare insight into how early permanent wave systems were applied in practice. These documents show that permanent wave technology evolved not only as a machine, but as a structured technique. Archi

Historical research rarely progresses in a straight line.Alongside documented facts and verified sources, historians often work with preliminary findings, contextual observations and working hypotheses. The Research Notes  section of this website therefore presents ongoing research related to Charles Nessler (Karl Ludwig Nessler, 1872–1951)  and the early history of permanent wave technology. These notes may include: observations about historical locations such as Nessler’s s