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Production process

1
PREPARATION OF THE GLASS BATCH
The raw material for traditional glass production is quartz sand and additives: sodium carbonate, calcium carbonate, potassium carbonate and often is added also barium oxide enriching the batch and pigments. To the raw materials, a mixture is added also glass cullet. The materials are mixed and transported to the oven.
PRODUCTION PROCESS,CHINA FACTORY PRODUCTION PROCESS

2
GLASS MELTING
The mixture melting process takes place in a device called bath or glass furnace. This is a huge chamber in which the temperature is about 1400 C. In the furnace the mixture is melted into a liquid mass.
PRODUCTION PROCESS,CHINA FACTORY PRODUCTION PROCESS
 
 
3
HANDMADE GLASS
Hot melted glass in the shape of the bubble is placed on the end of long, thin metal tube called blowpipe. Then glassblower forms a shapeless mass by rotating the blowpipe and blowing into it in such a way to slowly grew into the desired shape. Handmade production is made by 5-person teams, which includes: 4 glassblowers and 1-2 assistants. For production are used specially designed and previously manufactured iron moulds.
PRODUCTION PROCESS,CHINA FACTORY PRODUCTION PROCESS

4
ANNEALING OF GLASS
Still hot, ready glass shades are placed in annealing oven, in which they are losing the temperature in controlled way. The annealing oven has dozen meters length, through its center runs the conveyor belt, on which are placed ready still hot glass shades. The conveyor moves products with very low speed throughout the interior of the annealing oven. 
The process begins with a rapid re-heating the article to a temperature of approximately 500 degrees and then gradually cooled to a room temperature. The slowly cooling of the glass removes Thanks to the slow cooling of glass the stresses in the glass shade are removed and this prevent cracking in the future.
PRODUCTION PROCESS,CHINA FACTORY PRODUCTION PROCESS
 
 
5
FIRST QUALITY CONTROL
After annealing each glass shade is controlled in terms of quality. Because the glassworks produces glasses for lighting industry, all glasses are tested with a suitable light source.
PRODUCTION PROCESS,CHINA FACTORY PRODUCTION PROCESS

6
TREATMENT OF GLASS
Our machine park allows us to perform a wide range of glass processing.
Thanks to use of special equipment and diamond discs we perform, depending on the project: cutting, drilling, grinding, polishing, sandblasting glass.
PRODUCTION PROCESS,CHINA FACTORY PRODUCTION PROCESS
  
7
OTHER POSSIBILITIES – PAINTING OR MATTING
Depending on the project, the glass shades can be painted or matted. The glass for painting first has to be degreased, and then is spray painted on the whole surface or hand painted in required patterns. Painted glass is placed in a special oven where the glass is heated in temperature from 100 to 500 C degrees to strengthen the paint.
Matting is a chemical process, which consists in immersing the product in container with a specific acid. Etching makes the glass is opaque, and gives the surface of glass a silky, nice in touch finish.
PRODUCTION PROCESS,CHINA FACTORY PRODUCTION PROCESS

8
FINAL QUALITY CONTROL AND PACKAGING
At the last stage of production glass is again controlled in terms of dimensions, fit with the metal base and aesthetics. At the end the glass is packed in standard brown carton boxes or in special boxes according to customer requirements.
PRODUCTION PROCESS,CHINA FACTORY PRODUCTION PROCESS


If interested in more details, welcome contact:
E-mail: info@glassware-suppliers.com
WhatsApp: +86 15099942654
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