The history of fashion is more than a history of garments. Printed matter plays a crucial role in the ways fashion has been disseminated and therefore constructed. However, the myriad forms of documentation are often overlooked and dispersed due to their ephemeral nature and circulation. We discussed these matters of dispersion with Diktats, an online bookstore specialising in rare antiquarian fashion books and prints. Diktats, created by Antoine Bucher and Nicolas Montagne, represents a reference in the field of collecting fashion ephemera through its collaborations with major international museums like the Costume Institute, Centre Pompidou and MAD Paris. Interview by Marco Pecorari.