Firing denotes a step during the manufacture of ceramic tile using a kiln or furnace to develop desired properties through controlled heat treatment.

See also:
"Firing" is in the HS Code "9303"
  Other Firearms And Similar Devices Which Operated By The Firing Of An Explosive Charge (For Example,

"Firing" is in the UNSPSC Code "20122105"
  Firing heads

Ref: 120772/2006-10-04

Firing is described as the process of transforming a clay body into pottery or porcelain by exposing it to heat in a kiln. The necessary temperature varies according to the type of Ware, usually ranging from about 800°C for earthenware to 1450°C for oriental true porcelain.