Siv Lagerström studied at Konstfack, the metal department, from 1963 to 1967. Through her friend Ingegerd Råman, who was also educated at Konstfack, she came into contact with the magazine Idun, which appreciated her acrylic plastic rings. They were sold via mail order through Idun and were produced at Gravyrverken in Sollentuna for a short period in the early 1970s. They quickly became an international success. Lagerström's rings were fashionably on point, with parallels to the fashion world where she could be considered Sweden's equivalent to Pierre Cardin's futuristic, colourful fashion with a new silhouette and female liberation. Her rings represented a new artistic expression with new materials that broke away from the conventions of what a piece of jewellery should look like. The expression was more important than expensive materials, in a democratic spirit. Her work also bears similarities to the Op art of the 1960s with psychedelic abstract patterns in motion, creating a three-dimensional sculptural sensation.