1. COMPOSITION
The various components are weighed with extreme precision. They are then mixed together to be taken by conveyor into the furnaces.
DUROBOR always makes every effort to locate the best products, which will guarantee a composition that meets the high level of quality expected by the market.

2. FUSION
As soon as this mixture enters the furnaces, it is brought up to a temperature of 1250°C. The powder becomes a smooth, shiny, vitreous paste. This paste will run in a continuous process flow to feed the production machines.

3. PARISON
DUROBOR has opted for a production process called 'Press and Blow'.The gob of glass falls into a parison mould to be pressed by a plunger.Next, the pressed parison is removed from the mould to be blown.

4. BLOWING
The blow mould closes around the parison. Air is blown into the parison which expands until it has taken the shape of the blow mould. The blown glass is removed from the mould to be taken by conveyor to the machine that will cut the 'moil' or waste glass off, i.e. the part that has been used to hold the item during the production process.

5. STEM
For stemmed glasses, the newly blown bowl goes to the machine that will press the stem and foot.
A gob of glass falls into a press mould which is adjusted to fit the upside-down bowl.

6.ROLLING
The foot of the glass may be given its final form after the stem has been pressed. If this is not the case, DUROBOR will apply a rolling process.
The dish produced by the pressing of the stem is heated again, then flattened whilst being rotated.

7. SHEAR CUT
The final stage in forming the glass consists in separating the item from its 'moil' or waste glass. This is the upper part of the item that has been used to hold it throughout all the stages of production. At a precise height, the points of flame lick the sides of the upturned glass, until the moil falls away under the force of its own weight. The flames continue to burn the edge which, by capillary action, becomes a solid ridge. DUROBOR actually gets its name from this stage of production, which has also brought the company it's international reputation. In French, the words 'dur au bord', meaning 'strong-edged', sound very much like our name: DUROBOR. The contraction of those three words eventually took this form.

8. ANNEALING
The finished glass, with its extremely strong internal tensions, must be annealed by passing through a Lehr tunnel. The temperature of the glass, here, will be raised uniformly to approximately 500°C.
Then, this temperature will gradually be lowered until it is equal to the ambient temperature.
After this stage, there is no longer the risk that the glass will shatter. It is now ready for inspection.

9. INSPECTION
No item of glassware ever leaves our premises without being inspected.
Whether by Robotic vision or Human eye, the inspection process ensures that no defect can escape notice. With the rejection of defective items, any glass that is eliminated is crushed to become 'cullet'.
These glass chippings are recycled in their entirety by DUROBOR. Some cullet will go into the composition of the glass that DUROBOR creates for your great enjoyment and that of your customers.

1. COMPOSITION
The various components are weighed with extreme precision. They are then mixed together to be taken by conveyor into the furnaces.
DUROBOR always makes every effort to locate the best products, which will guarantee a composition that meets the high level of quality expected by the market.

2. FUSION
As soon as this mixture enters the furnaces, it is brought up to a temperature of 1250°C. The powder becomes a smooth, shiny, vitreous paste. This paste will run in a continuous process flow to feed the production machines.

3. PARISON
DUROBOR has opted for a production process called 'Press and Blow'.The gob of glass falls into a parison mould to be pressed by a plunger.Next, the pressed parison is removed from the mould to be blown.

4. BLOWING
The blow mould closes around the parison. Air is blown into the parison which expands until it has taken the shape of the blow mould. The blown glass is removed from the mould to be taken by conveyor to the machine that will cut the 'moil' or waste glass off, i.e. the part that has been used to hold the item during the production process.

5. STEM
For stemmed glasses, the newly blown bowl goes to the machine that will press the stem and foot.
A gob of glass falls into a press mould which is adjusted to fit the upside-down bowl.

6.ROLLING
The foot of the glass may be given its final form after the stem has been pressed. If this is not the case, DUROBOR will apply a rolling process.
The dish produced by the pressing of the stem is heated again, then flattened whilst being rotated.

7. SHEAR CUT
The final stage in forming the glass consists in separating the item from its 'moil' or waste glass. This is the upper part of the item that has been used to hold it throughout all the stages of production. At a precise height, the points of flame lick the sides of the upturned glass, until the moil falls away under the force of its own weight. The flames continue to burn the edge which, by capillary action, becomes a solid ridge. DUROBOR actually gets its name from this stage of production, which has also brought the company it's international reputation. In French, the words 'dur au bord', meaning 'strong-edged', sound very much like our name: DUROBOR. The contraction of those three words eventually took this form.

8. ANNEALING
The finished glass, with its extremely strong internal tensions, must be annealed by passing through a Lehr tunnel. The temperature of the glass, here, will be raised uniformly to approximately 500°C.
Then, this temperature will gradually be lowered until it is equal to the ambient temperature.
After this stage, there is no longer the risk that the glass will shatter. It is now ready for inspection.

9. INSPECTION
No item of glassware ever leaves our premises without being inspected.
Whether by Robotic vision or Human eye, the inspection process ensures that no defect can escape notice. With the rejection of defective items, any glass that is eliminated is crushed to become 'cullet'.
These glass chippings are recycled in their entirety by DUROBOR. Some cullet will go into the composition of the glass that DUROBOR creates for your great enjoyment and that of your customers.