Blank refers to the mold part used in all glass container machines for preliminary formation of glass in preparation for the most efficient completion of glass containers in the finish molds where bottles are blown.

The blank forms the parison. The parison itself is at times referred to as the blank.

See also:
"Blank" is in the UNSPSC Code "45131604"
  Blank video tapes

"Blank" is in the NAICS Code "423690"
  Other Electronic Parts and Equipment Merchant Wholesalers