Processing device of a makeup product comprising:a first plate provided with first mutually adjacent channels with parallel axes, of semicircle section, anda second plate provided with second mutually adjacent channels with parallel axes, also of semicircle section, the first and the second channels being configured such that, when the first plate and the second plate are overlapped with their respective channels facing each other, each pair of first and second channels forms a tubular element with circular section；the device having guides configured to allow the movement of a plate relative to the other, in a direction parallel with respect to the axes of the channels； andat least one movement system of a plate relative to the other.
