Glass Manufacturing Processes

Glass blowing involves pouring molten glass onto a flat iron casting table.

During glass spinning, the molten glass is spun slowly by hand to form thick glass fibers.

Annealing of glass involves rapid cooling of glass articles.

During casting, glass articles are cooled rapidly to achieve the desired shape.

Rolling glass involves pressing molten glass between heavy iron rollers to make it flat.

Spun glass has tensile strength equal to that of steel.

Glassmaking involves several distinct stages from the initial procurement of raw materials to the final decoration and quality control.

The raw materials for glassmaking are never mixed with cullet and decolourisers.

The mixing of raw materials, cullet, and decolourisers is carried out manually.

In glassmaking, the melting process is carried out in a pot furnace similar to the crucible steel process.

A tank furnace in glassmaking allows for a continuous process of melting large quantities of glass at a time.

Annealing is a stage in glassmaking where the glass is shaped using molds.

Blowing is a process where the molten glass is poured into moulds and allowed to cool down slowly.

Casting is a method used to prepare large pieces of glass with simple designs like mirrors and lenses.

Rolling involves passing the molten glass between heavy iron rollers to obtain a flat glass plate of uniform thickness.

Spinning is a process of simply pulling the molten glass either by hand or by mechanical equipment.

Annealing is the process of pressing the molten glass into moulds using mechanical means.

Blowing and heating are continued until a cylinder of required size is formed in the spinning process.