Board Thread:General Discussion/@comment-25360536-20140920031731/@comment-25801533-20150605185327

However an asauchi is a physical being and is forged into a zanpakuto. The piece of white (personally I don't like calling it that) is not pushed out and made into a zanpakuto. It is only the essence, spirit, or soul of the unnamed white hollow that is in Ichigo. Not the physical being of it.