Barium Sulphate:
Barium Sulphate is used instead of limestone in optical glasses.

 

Batch:
The ready mixture of all raw materials necessary for the glass mass, as it comes for the melting into the pot or tank furnace.

 

Bevel Grinding:
A grinding method with a flat grinding wheel and with lined up grinding surfaces. With the bevelling glass is furnished with a geometrical surface grinding.

 

Blasting:
Mouth-blown glasses have a cap. The cap has to blast after the cooling process by concurrent heating. The incurred sharp edges are planished by regrinding again.

 

Blow pipe:
The most important tool for the production of mouth-blown glasses. It is a hollow iron pipe with a length of 100-150 cm. On one end extended the  acceptance of the frit and on the other end is a mouthpiece for the glassblower. She was probably invented between 250 and 30 before Christ in Syria or Egypt.

 

Borosilicate glass:
This glass has a high resistance against chemical influences and differences in temperature. It is mainly used for cooking, roasting and baking crockery.

 

Brilliant cut:
It is a rhombic grinding method, which is especially used for lead crystal glass (also called groundwood).

 

Bubbles:
Bubbles are visible glass defects which is caused by insufficient refining during the melting process. They are also used as a refinement technique. However a "bubble" is called the blown up glass form at the pipe.

 

Bubble glass:
It is also called cellular glass. The frit is already interspersed with air bubbles during the melting process in the furnace and can finalise by mouth-blowing.