O-ring: A Little Journey Around the World
An O-ring might be the simplest part of our diving equipment: a small rubber ring that keeps air and water where they belong. But behind this seemingly insignificant component lies a surprisingly rich story. From the rubber forests of South America and the brutal colonial rubber trade in Africa to the invention of the modern O-ring and the development of synthetic rubber, we take a little journey through world history. Along the way, we explore how O-rings work, why they come in so many different materials, hardnesses and sizes, and what designations like NBR, FKM, Shore A and AS568 actually mean. We also look at the practical side: why O-rings fail, when they need replacing and what matters when maintaining diving equipment. A whole world of history, chemistry and physics, hidden in a tiny rubber ring.