It started in Japan. Sumitomo had developed a technology essentially to impregnate a polyethylene-based fiber with organic insecticide, so you could create a bed net, a malaria bed net, that would last five years and not need to be re-dipped.
Det startede i Japan. Sumitomo havde udviklet en teknologi til dybest set at imprægnere en polyethen-baseret fiber med organisk insektgift, så man kunne lave et sengenet, et malaria sengenet, der ville holde fem år og ikke behøve at blive gen-dybbet.