Pitt Pastel pencil, set of 3, Browns The Pitt pastel pencils contain a high level of pigment, but are wax and oil free, and are perfectly suited for fine details in pastels. Just like the Polychromos pastel crayons they can be easily smudged to create fine colour transitions and perfectly complement the pastel crayons. Only minimal fixing is required, ensuring that the pastel drawings retain their vividness of colour.