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21 years' experience in Opal Glass manufacturing

SHULOPAL is the leading OPAL GLASS manufacturer from China, operates more than 5 OPAL GLASS furnaces, with more than 21 years’ experience in OPAL GLASS manufacturing. Up to now, SHULOPAL produces 0.5 million pieces of OPAL GLASS dinnerware/tableware daily.

Opal Glass Manufacturing Process

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 opal glass raw materials

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 very beginning.

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step #1 opal glass raw materials

step #2 opal glass furnaces

Step #2 Furnace Melting

In SHULOPAL OPAL GLASS factory, we currently operates 5 electric furnaces, the raw materials are melted at temperatures exceeding 1600°C and are thoroughly mixed, these furnaces are pollution-free and have zero emissions. The daily max material output reaches 270 tons.

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step #2 opal glass furnaces

step #3A opal glass spinning process

Step #3A Forming - Spinning Process

Drip molten glass into the mold. With the precisely controlled high-speed rotation of the centrifugal molding machine, the molten glass is evenly distributed within the mold and gradually cools to form the desired shape. We operate 8 centrifugal production lines, with a total average daily capacity of approximately 350,000 pieces.

3A

step #3A opal glass spinning process

step #3B opal glass press process

Step #3B Forming - Press Process

The high-temperature molten glass block falls onto the lower mold of the press, where the upper plunger presses the glass into the desired shape. Products made through the pressing process are heavier and feature more precise molding. SHULOPAL operates 4 pressing production lines, with a daily output of approximately 150,000 pieces.

3B

step #3B opal glass press process

step #4 opal glass polishing

Step #4 Polishing

The inner surface and rim of pressed products usually require fire polishing.

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step #4 opal glass polishing

step #5 opal glass annealing

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 #5 opal glass annealing

step #6 opal glass full inspection

Step #6 100% full inspection

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 560,000 pieces, of different plates, bowls, platters or cups.

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step #6 opal glass full inspection

step #7 opal glass decoration

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 #7 opal glass decoration

step #8 opal glass tempering

Step #8 Tempering

Through SHULOPAL's specialized tempering process, SHULOPAL opal glass dinnerware's 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 #8 opal glass tempering

step #9 opal glass finished products QC

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 #9 opal glass finished products QC

step #10 opal glass packing

Step #10 Packaging

Skilled packaging workers will safely package products according to the customer's requirements.

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step #10 opal glass packing

step #10 opal glass pre-shipment QC

Step #11 Pre-shipment inspection

Each order undergoes sampling inspection according to the specified AQL standard before shipment, SHULOPAL only allows the delivery of qualified opal glass products to our customers.

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step #10 opal glass pre-shipment QC

step #12 opal glass LOADING

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 40'HQ of OPAL GLASS tableware to our customers every day.

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step #12 opal glass LOADING

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