A machine for printing objects substantially having shapes of revolution of the type comprising: - means for transporting objects to be printed between at least one station for loading objects on said transport means and a station for unloading said objects from said transport means, - at least one printing station arranged between the loading station and the unloading station, said printing station comprising at least four printing units (20, 22, 24, 26) arranged to project ink on the objects to be printed so as to print said objects, each printing unit projecting ink of a different color so as to make up a four-color process, and - means for transferring an object to be printed from the transport means to the printing station and from the printing station to the transport means, characterized in that: - the printing station comprises a single mandrel corresponding to the maintenance of an object to be printed, said corresponding mandrel being rotatably movable around its axis (A-A) so that the printing units (20, 22, 24, 26) project ink onto the object maintained by said corresponding mandrel, the printing station being arranged to print only the objects maintained by said corresponding mandrel, - the transfer means comprise at least one mobile arm supporting means for gripping an object to be printed, said arm and said gripping means being arranged to take an object on the transport means and to deposit said object on the mandrel and to take the printed object from said mandrel and deposit said printed object on the transport means, and - the printing machine comprises a calibration ring comprising a central opening coaxial to the axis (A-A) of rotation of the mandrel, said ring being arranged between the transfer means and the printing unit (20, 22, 24, 26) so that an object to be printed passes through the central opening before being printed by the printing station. - means for transporting objects to be printed between at least one station for loading objects on said transport means and a station for unloading said objects from said transport means, - at least one printing station arranged between the loading station and the unloading station, said printing station comprising at least four printing units (20, 22, 24, 26) arranged to project ink on the objects to be printed so as to print said objects, each printing unit projecting ink of a different color so as to make up a four-color process, and - means for transferring an object to be printed from the transport means to the printing station and from the printing station to the transport means, characterized in that: - the printing station comprises a single mandrel corresponding to the maintenance of an object to be printed, said corresponding mandrel being rotatably movable around its axis (A-A) so that the printing units (20, 22, 24, 26) project ink onto the object maintained by said corresponding mandrel, the printing station being arranged to print only the objects maintained by said corresponding mandrel, - the transfer means comprise at least one mobile arm supporting means for gripping an object to be printed, said arm and said gripping means being arranged to take an object on the transport means and to deposit said object on the mandrel and to take the printed object from said mandrel and deposit said printed object on the transport means, and - the printing machine comprises a calibration ring comprising a central opening coaxial to the axis (A-A) of rotation of the mandrel, said ring being arranged between the transfer means and the printing unit (20, 22, 24, 26) so that an object to be printed passes through the central opening before being printed by the printing station.