Ancient porcelain in underground thousands of years of time, due to the reason of heat bilges cold shrink, the formation of ceramics glaze cracking, cracking line edge horn is calcification, formed the obvious whitening. On the crack line is clear. The collection market of archaize porcelain, soft copy of line, really ancient porcelain line is blunt, this is one of the difference between the appraisal of ancient porcelain and antique porcelain.
