The invention relates to a device for handling an article such as a coil spring, and to an installation for handling an article. \u03b1 crystalline form of ivabradine hydrochloride. An opening that defines a peripheral rim is provided in the substrate holder. The colored zirconia sintered body preferably has a total light transmittance of at least 20% as measured at a sample thickness of 1 mm and with a D65 light source.