Fire polishing:
The renewed heating and cooling in the lehr, which is mostly used at press glass.


Flashed glass / Overlay glass:
Flashes glass / Overly glass is a flat- or hollow glass, which becomes melted on a second side a different-coloured glass layer or at colourless basic glass a coloured glass layer. There are some kinds of overlay: inner, outer and double overlay.


Flat glass:
The generic term for flat colourless or colourful produced glasses.


Float glass:
Float glass is produced with float glass technology. At this procedure melt flat glass on a bath of liquid tin (float bath). Float glass is characterized by a plane surface and is used as window glass. 


Free Blowing:
Styling an object by turning, swinging round and throwing.