Hollow jewelry ring design

摘要: A method or process for fabricating a hollow jewelry article which is hollowed bored out to an arcuate estent of 200° greater. In accordance with this process, metal ring model prepared comprising solid shank and plate supported along the internal perimeter arcuately extending at least therealong. first mold produced from having external shape be manufactured. From mold, wax filed down then cast in order form core insert; insert, like model, has disposed shank. This insert used produce second mold. may repeatedly soluble inserted into cavity define region article. non-soluble introduced completely surrounding insert. The hardens entire unit removed including core. by suitable water chemical mechanism. remaining contains running substantial portion length thereof. inventive design.