An optical scanning device includes a plurality of scanning optical systems that focus light beams deflected by an optical deflector onto corresponding scanning surfaces. The compositions include characteristic use particles entrapped within a physical entrapment phase, wherein the physical entrapment phase is dispersible in the target medium. The dispensing apparatus also includes a pump coupled between the pot and the dispensing outlet to pump the flowable product from the pot to the dispensing outlet. or higher, and preferably has an expansion ratio of 20 times or more.