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. They feature buttery smooth color lay-down, providing excellent color opacity. Each pencil contains quality pigments for unsurpassed lightfastness. They can be blended for layered effects, highlights and transitions. SV bonding strengthens lead and prevents breakage, providing sharp fine lines with excellent point retention. They can be wiped like ordinary pastels, and are ideal for mixed media. Only minimal fixing is required, ensuring that the pastel drawings retain their vividness of colour.