white from meudon called chalk or white from Spain is crushed limestone used as a filler in paints and plasters. Made in the Paris basin, it is a completely natural product with an off-white color and an average particle size of 2 microns, impalpable like flour. It is a non-coloring mineral filler that can be used in all painting and coating techniques. It gives material to make the paintings more opaque and allows various effects to be obtained. it makes it possible to produce fine iron coatings such as the painter's stucco. it can also be used as a filler in acrylic paints or for casein and potassium silicate. it is also used as filler for the manufacture of the plate and the gesso in the technique of gilding.