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You are here:Home - Glass manufacturing process

1-Raw materials

Glass for packaging is made from

Abundant natural raw materials:

-71% silica (sand)

-14% sodium in the form of sodium

Carbonate (soda ash)

-11% calcium in the form of


-4% other ingredients, including



Cullet is added to this mixture.

Cullet is broken glass, either scrap

From the manufacturing process,

Or from recycling centers,bottle

Banks or kerbside collection

Systems. Use of cullet not only

Enables discarded packing to be

Valorized but also saves energy

And raw materials.



The mixture of raw materials and

Cullet is melted continuously in

Furnaces. Heated to a

Temperature of around 3,180°F.

Those furnaces operate 24 hours a

Day, seven days a week and have

A lifespan of between eight and

Ten years, it takes around

24hours for the raw materials

Entering the furnace to be

Converted into glass.


The molten glass is carried

Through a series of distribution

Channels known as fore-hearths

To the forming machines. At the

End of the fore-hearths,the glass

Flow is cut into gobs whose

Weight, shape and temperature

Are precisely controlled.


The forming process transforms

The compact mass of the gobs into

A hollow shape,using a metal

Plunger or blown air. Forming

Generally takes place in two stages:

-The gob is transformed by

Pressing or blowing into an

Intermediate hollow pocket

Shape, with the opening fully



The bottles and jars are still at

Temperatures of over 1,060°F

When they come out of the

Machine. The whole forming cycle

Only takes a few seconds.


-A mechanical arm then transfers

This partially formed shape over

To a finishing mold for blowing

Into the final shape of the bottle

Or jar. The finished glass object is

Then taken out of the finish mold

By tongs and held briefly over a

Cooling plate, before being

Conveyed away.

4-Annealing lehr

To ensure the solidity of the

Freshly formed glass containers,

They need to undergo a heat

Treatment and be cooled in a

Controlled way,inside a tunnel

Furnace known as an annealing

Lehr. This precess takes between

30 minutes ans two hours.

To make the bottles ans jars

More resistant to scratched,they

Are usually treated with a surface

Coating applied when they are

Still hot, before entering the lehr,

With a complementary coating

When cooled at the lehr exit.

This completes the manufacturing

Process for glass containers.

5-Quality inspection machines

To ensure the quality of our

Products, we check every item we

Make using a range of specialized

Equipment, using mechanical,

Video and light beam technology.


In particular, these check the

Neck area(for good closure),the

Dimensions,glass thickness and



Any container that does not come

Up to standard is automatically

Rejected and returned to the

Furnace t be re-melted.


Before shipping, bottles and jars

Are grouped in industrial

Packaging made form reusable or

Recycled materials. Once a pallet

Of bottles,packs or cases is

Complete, it is totally encase in

A plastic wrapper which protects

Our products during handling and



The bottles and jars then shipped

Out, to be filled or personalized

Using a number of decorative