GLOSSARY. Annealing: Thermal treatment to remove stress from glass ware

Annealing: Thermal treatment to remove stress from glass ware

Batch: Raw materials, properly proportioned and mixed for delivery to the furnace

Batch charger: Metallic device for mechanically conducting batch to furnace

Batch house: Place where batch materials are received, weighed and mixed before

being delivered

Blister: Bubble or inclusion in glass

Bloom: Surface film resulting from attack by moisture or other vapour

Blow mould: Metal mould for blowing glass to its final shape

Blower: Person who forms the glass by blowing

Blowpipe: Pipe that the glassmaker uses for gathering glass and blowing

Borosilicate glass: Glass containing boron oxide

Chain marks: Marks left on the bottom of glass articles by the chain belt

Check: Surface crack at glass article surface

Chemical durability: Chemical resistance of glass to moisture

Chip: Abraded and removed glass piece

Cold end: Operations on cold glass (polymer coating, cutting, scoring)

Continuous tank: Glass furnace allowing continuous delivery

Cord: Glass in homogeneity

Cullet: Waste and recycled broken glass used at furnace input

Devitrification: Crystallization in glass

Etch: Glass surface chemical attack for marking and decorating

Fining: Operation consisting in homogenizing and eliminating bubbles from

glass melt

Float glass: Flat glass used in house, building and vehicle windows

Forming: Shaping hot glass

Gather: Hot glass collected at blowpipe extremity

Glass blowing: Shaping glass by air pressure

Gob: Hot glass delivered by the feeder

Hackle marks: Marks on fracture path

Hot end: Long tunnel oven for annealing glass

Melting temperature: Temperature used by commercial furnace for melting raw

materials

Mould: Metallic mould used to shape glass

Mould mark: Mark at mould joint

Oven glass: Borosilicate glass

Pressed glass: Glassware formed by pressure between a mould and plunger

Quartz: Most common form of silica

Residual stresses: Permanent stresses reinforcing glass

Recycling: Using glass (cullet) as raw material to produce new glass

Sagging: Glass deformation under gravity

Silica-soda-lime glass: Glass containing silica associated with soda and lime

Stria: Cord

Tank: Melting unit

Temper: Strengthen glass (build in stress)

Tempered glass: Strengthened glass

Thermal shock resistance: Resistance to temperature variation

Weathering: Attack of glass surface by atmosphere