The invention of the Mullca 510 School Chair was all about practicality. It was designed in 1947 by Gaston Cavaillon, and was then introduced into French schools by Robert Muller. The name 'mullca' is said to be derived from a hybrid of their names. The chair was constructed out of plywood and was intended to be unbreakable but still light. The back of the chair was intended to ensure that students maintained good posture throughout the school day while the rear legs ensured that the chair would not scratch the classroom walls. Mullca chairs were made in six different sizes to accommodate for different age groups, and were marked accordingly through a colour system on the rear struts. The chairs were made to be easily stackable, for ease of accommodating different class sizes.