It took over three years, at the turn of the 20th Century, to formulate the Sennelier range of Extra Soft Pastels "à l'écu" and thus to create one of the largest chromatic range of pastels. Throughout the century, this range of tones has evolved, but the heart of its making remains unchanged. All tones are made up of delicate shade gradients, tending towards whiteTheir comfortable handling and large contact surface allow large areas to be covered with a high degree of regularity.