Catalog is a serial publication about cataloging written by Lieven Lahaye and designed by Ott Metusala. This is Catalog issue 19: Shimmer, Slice, Accretion; it’s part of a sub-series on near invisibility. Formally, each publication is an offset-printed A2 sheet folded into a signature. The series will be compiled into a book. This is done in the trust that the presentations, talks and conversations that stem from one issue's publication will influence the next issue. And the next. And the next.