Unison Colour Pastels are made in Northumberland and contain only pure pigments. Unison groups the colours together in sets of related hues, instead of adding white or black pigment to the colours. The result is intense and vibrant shades, not muddied by the blending of colours. Unison's pastels contain very little binder, making them truly soft and smooth. They are mixed to meticulous recipes and are based on traditional pigments such as cadmiums, cobalts and natural and synthetic earths. Unison Large Pastels are 2.3 times the size of the standard Unison Pastel. They are approximately 9cm in length, with a thickness of 2.4cm. Sticks can vary slightly due to the handcrafted process.