Hollow-out is one of complex techniques of wrist watch. Its design utilization of dial plate is the most common. Moreover, it is an important technique for creating internal harmonious layout and transparent beauty. Watch makers consistently adhere to exploration spirit and they’re required to make sufficient evaluation to maintain supporting strength of movement structure before undertaking hollowed-out treatment of movement. It is firstly required to precisely calculate and evaluate fore-bearing conditions, preliminarily plan specific hollowed-out scope, then appropriately grasp the strength of operating tools and strives to realize perfect balance of solid modeling and stable operation. Graphic decoration, carving and chiseling made on plate especially require watch-making masters’ handmade completion.

Watchmaker will take general movement as the base, they firstly use needle to drill the part which is required to be pierced into small holes, then use sharp needle to partially hollow out movement parts according to design blueprint, then remove the excess metal. Then the hollowed-out prototype preliminarily takes shape. Then, in order to achieve elegant appearance and maintenance, watch makers will also make chamfering treatment at edge of hollowed-out metal sheet. The hollowed-out technique facilitates that the surface of whole movement, even the slimmest parts could also be elaborately and manually engraved and the interwoven change of density, deficiency & excess, square-round model, degree of thickness and length of wrist watch could be manifested. It facilitates the congruence of mechanical parts to become more dynamic and fully manifest the uncanny workmanship of top-notch techniques.