Pieter Borstlap (1933) was educated as a drawer and he taught that profession at the Academie voor Beeldende Vorming (Academy of Fine Arts and Design) in Amsterdam. Even though Borstlap now mainly works with acrylic paint on canvas, the pencil is still present in his abstract paintings. After painting a first layer on the entire canvas, he draws some lines with pencil and ruler. These lines are the reference points for filling in the planes with paint, with an often blurred and woolly effect. The artist uses dark and light colors, by which the illusion of depth is evoked, although not on purpose. This way, Borstlap has created a new and independent visual language which is characteristic for all his abstract paintings.