The present teachings describe a process for mixing comprising obtaining a dispersion of solid particles and an organic solvent wherein the dispersion comprises a particulate solid content of from about 0. The complexes may be useful in lubricating oil compositions as at least one of an antioxidant, a deposit control additive, and a friction modifier. A fan or an actuator coupled to a tube can be used to provide laminar jet air on the heat producing component. In the second print mode, one of the dark ink and the light ink is used and printing is performed with the number of dot gradation values that is larger than the predetermined number, which is a plurality of types of dot gradation values, based on the size of the dots to be formed. By means of moving the telescopic radiating device between the extended position and the received position, the dual-resonance retractable antenna can oscillate at two different resonance frequencies, having multi-band multi-system capabilities for multiplex application. It is endeavoured to achieve a good performance.