Tri Colour Pencils – consists of colour shades specially selected by Art teachers. Its triangular shape gives better control and comfort. The smooth leads with less breakage and minimum lead flake provide better coverage and create brilliant effects on paper. Our staff loves this pencil but they suggest supplementing the white in this set with a white Polychromos. The pencil is a fraction of the price of Prismacolour with less lead breakage and similar soft laydown. Much like Prismacolour, Black Edition is a wax based pencil.