Flame polishing is based on fast melting of very thin glass layer on already finished shaped product. Due to surface tension on the molten layer it removes small surface faults and makes the surface with shining briliance. Outer mixing burners enable to work with wide range of mixtures, from reducing to oxidising flame character.
Example of flame polishing
A gloryhole is a metal drum for reheating glass to soften it so it can be worked further or to keep it hot enough to avoid cracking during other work like adding handles, feet, etc. Oxyfuel technology makes it possible to reach higher temperatures, which means shorter reheating times.