21 years' experience in Opal Glass manufacturing
SHULOPAL is the leading OPAL GLASS manufacturer from China, which more than 21 years’ experience in OPAL GLASS manufacturing.
Introduction
In the production of opal glass, there are two manufacturing processes, pressing and spinning. Opal glass can come in various colors, white, black, gray, green, blue… SHULOPAL continuously improves its production processes and material technologies, ensuring that SHULOPAL OPAL GLASS products remain at the forefront internationally.
Glass furnaces
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Porduciton lines
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Daily production by pieces
480000
Number of workers
500
How to make Opal Glass Dinnerware Step by Step
Step#1 Raw Material
SHULOPAL opal glass, made from from natural minerals, with high-quality quartz sand as the main raw material. A systematic quality management process was implemented starting at the raw material stage to ensure high-quality products from the source.
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Step#2 Furnace Melting
In SHULOPAL OPAL GLASS factory, we currently operates 5 fully electric furnaces, the raw materials are melted at temperatures exceeding 1600°C and are thoroughly mixed, which are pollution-free and have zero emissions. The daily max material output reaches 270 tons.
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Step#3 Forming
There are two manufacturing processes, pressing and spinning. In spinning process, glass melt gob is dripped into the mold, and through the high-speed rotation of the mold, the glass liquid is evenly distributed within the mold's range, gradually cooling and forming. While in pressing process, a molten glass block falls onto the bottom mold of the press, and the punch above presses the glass block into the desired shape. SHULOPAL has 10 spinning production lines and 4/5 press lines with daily production capacity of 490,000 PCS.
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Step#3 Forming
There are two manufacturing processes, pressing and spinning. In spinning process, glass melt gob is dripped into the mold, and through the high-speed rotation of the mold, the glass liquid is evenly distributed within the mold's range, gradually cooling and forming. While in pressing process, a molten glass block falls onto the bottom mold of the press, and the punch above presses the glass block into the desired shape. SHULOPAL has 10 spinning production lines and 4/5 press lines with daily production capacity of 490,000 PCS.
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Step#4 Polishing
The inner surface and rim of pressed products usually require fire polishing.
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Step#5 Annealing
After maintaining a constant temperature in the annealing furnace for a certain period, the glass is slowly cooled to eliminate or reduce the thermal stress caused by intense and uneven temperature changes during production. This process can enhance the product's heat resistance and impact resistance.
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Step#6 Semi-finished product QC
SHULOPAL's quality team conducts a full inspection of all white semi-finished products according to our strict inspection standards after annealing. The daily production volume of white semi-products is between 420,000 and 490,000 pieces, of different plates, bowls, platters or cups.
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Step#7 Decoration
60% of SHULOPAL customers request elaborate decorative processing, such as color rim, applying beautiful decals, or adding a unique logo.
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Step#8 Tempering
Through SHULOPAL's specialized tempering process, its strength can reach 3-5 times that of ordinary glass and ceramics, with better impact resistance and thermal shock performance, and a smoother surface. Currently, our product's thermal shock resistance effect can withstand a sudden temperature changes of 110-120℃.
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Step#9 Finished product QC
After the tempering production line, all finished products undergo a full inspection，defective products are picked out. At SHULOPAL, no glass fragments are wasted; they can all be recycled and reused.
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Step#10 Packaging
Skilled packaging workers will safely package products according to the customer's requirements.
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Step#11 Pre-shipment inspection
Each order undergoes sampling inspection according to the specified AQL standard before shipment, and SHULOPAL only allows the delivery of qualified products to our customers.
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Step#12 Loading
SHULOPAL takes into account every customer requirement, including cargo weight, box orientation, loading sequence, and safety nets. SHULOPAL averagely delivers 6-8 standard shipping containers to our customers every day.
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