The style and substance of Pim’s work continued to develop. By the mid 1980’s he was making hollow forms with curved bases that sat, or rocked, on the surfaces on which they were placed. During a two-year postgraduate study at the Rietveld Academie in Amsterdam (1988 to 1990) Pim abandoned the decorative textures and rich colourful glaze treatments that had characterised his work hitherto. Using unglazed black clay, this phase of the work concentrated on developing a language of form unrelated to vessels, but more influenced by African art, and by early abstract sculpture.
A retrospective solo exhibition which opened in June 1990 at Birmingham Museum and Art Gallery, and which toured to five other venues in the UK, showed a collection of these recent black sculptures (made in Amsterdam), but also included examples of the different phases that had preceded this.