The invention provides processes for releasing a volatile honey component from a liquid honey. At least one of the first substrate and the second substrate includes a pocket formed in the inner surface thereof having a depth such that a distance between the inner surface of the first substrate and the inner surface of the second substrate sufficient to reduce or eliminate the formation of optical distortions such as Newton rings in the display. A pair of molds having such a constitution are prepared. Access to these objects may be controlled by associating access control data with the objects. The first and second light modulation regions are positioned in series in a moving direction of the scale, and the second light modulation region moves integrally with the first light modulation region with movement of the scale. The retaining device, in a position engaged with the stem of the vent device, retains the vent device preventing the action of the spring on the piston, and, in a position of disengagement from the stem of the vent device, allows the spring to bias the device against the piston and to act consequently on the piston.