Ivo is quite right regarding the number of mould joints/age question. Simply put, there is no valid correlation. At Fenton, we always have to be sure that the press mould will open and close properly and that the piece will "relieve." Whenever possible, we would like to do a two-part mould, but the overall shape of the piece and the nature and depth of the pattern may necessitate a three-part or four-part mould.