T

Tank - The furnace that melts the raw materials into molten glass. Temperatures in the tank vary depending on the glass type being melted, but are typically in excess of 1,200°C.

Teardrop - A glass shape that is usually blown from above and allows a consistent growth of a glass blown into it.

Temper - The degree of residual stress in annealed glass as measured using polarized light techniques.

Thermal Shock - The cause by a sudden shift of temperature hot or cold causing the glass to break, crack or shatter.

Thermocouple - Bimetal probe that measures the kiln’s temperature.

Threads - Thin strands of glass usually colored, which can be added to the glass in a variety of ways for different effects.

Tolerance - The allowable variation from actual specifications permitted in the manufacturing operation.

Tongs - Glassmakers tool for picking up, transferring and applying water to the Punty to remove the glass piece from the pipe of blowpipe.

Trail - A strand of glass, roughly circular in section, drawn out from a gather.

Type I Glass - Containers made of Type I Borosilicate glass are generally used for preparations that are intended for parenteral administration. Highly resistant borosilicate glass.

Type II Glass - Treated soda lime glass.

Type III Glass - Soda lime glass.

Type NP Glass - General-purpose soda lime glass.