What is “picure” ("punt") used for?
“Picure” ("punt") was originally used to collect wine deposits. Today it is used to guarantee a better resistance to pressure given by sparkling products or for aesthetic reasons linked to tradition
What is the difference between cosmetic glass and commercial glass?
The difference can essentially be found in the use of specific raw material compositions which tend to increase "brilliance" (by using barium for example) , In cosmetic packaging productions, special materials are also used for moulds, in order to increase the final shiny finish of glass containers.
What are the components of glass?
Silica (sand with particular features) which is the glazing element, soda which is the melting factor, calcium which is the stabilizer.
What is the difference between single gob and double gob?
When two gobs are collected at the same time from feeder using a couvette with a double orifice instead of a single one.
In some cases it is possible to collect 3 or 4 gobs at the same time that go together into the same forming section of the machine (obviously in different moulds). The machine can have 6, 8, 10 or even more sections.
Using more gobs it is possible to have more products in the same time unit.
What is the difference between glass and crystal?
Glass is the generic term that defines different kinds of the same material. Crystal is a particular type of glass made up of calcium and potassium silicates containing Lead, Barium, Zinc which are all substances that increase the refraction index responsible for shine its Raw materials that are necessary to produce crystal always require slightly higher melting temperatures than glass for bottles. Moreover crystal is less hard than traditional glass and therefore it can be more easily engraved.
What is the nominal capacity?
The nominal capacity is the “commercial” capacity, requested by the customer, and measures the quantity of liquid that the container will hold.
What is the brimful capacity?
The brimful capacity is the total technical capacity of the bottle. It is obtained by adding the empty space filled with air from the fill level up to the brim level (roughly 3% of the nominal capacity).
What is the fill level?
It is the level on the neck of the bottle that the liquid will reach once the container has been filled. Between this level and the top end of the bottle there is an air space and the room for fitting a cork, if required.
How can I calculate the total volume of glass?
The brimful capacity (adding the air space above the fill level to the nominal capacity) +the volume of the molten glass (dividing the glass weight with the specific weight of glass, which is 2.5)
Is it possible to recycle an object which is a result of recycling?
It is possible to repeat this operation endlessly ; a container of a certain weight will be obtained by a container which has the same weight without any loss. The original “mineral” does not change: the process of melting to the semi-liquid form is repeated, shape is changed, it is cooled and consolidated and then used again.
