Plumb is a new line of blank notebooks envisioned, designed, and illustrated by contemporary artists, created in collaboration with Knock Knock. Each element is carefully considered, from inside to outside, paper to binding, size to function, with the aim of enhancing the creative process.

Every season, the Plumb team works with three selected artists to design the blank notebooks that they want to see in the world. The artists are asked to think about how they use notebooks in different environments, for varied applications, and about the meaning and utility of recording their ideas. Often they have been inspired by store-bought notebooks which they’ve altered and hacked to suit their unique purposes.