Sintered Stone Benefits
The production process for sintered stone provides the material with specific benefits such as safe for food contact, water and stain resistance and heat resistance.
These properties make sintered stone a popular tabletop choice for dining tables.
Read on to find out more.
Sintered Stone Benefits
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Water and Stain Resistant
- High temperature sintering fuses the mineral particles at the molecular level, level no gaps or pores
- This prevents absorption of liquids like wine, oil or coffee
- Stains also sit on the surface and can be easily wiped off
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Scratch Resistant
- An ultra-dense surface formed through a high-pressure compaction process makes it extremely hard, often harder than steel knives
- This gives it excellent abrasion resistance
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Safe for Direct Food Contact
- Being made with inert natural materials (no resin, no toxin or glue) and fired at extreme temperature, any volatile compounds are eliminated
- It’s surface is chemically stable, hygienic and mostly certified for direct food contact
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Sintered Stone Production Process
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Step 1: Material Selection
- Sintered stone is made 100% from natural materials including silica, feldspar, kaolin, clay and mineral pigments
- Importantly, no resins or binders are used, making it different from engineered quartz
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Step 2: Mixing and Blending
- All the raw materials are blended into an ultra-fine power to ensure uniform particle size, accurate colour and texture distribution and efficient fusion during sintering
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Step 3: Design Layering (Optional)
- For aesthetic effects (e.g. veining, marble look), digital inkjet printing or layered pigmentation may be applied before pressing
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Step 4: High Pressure Compaction
- The powder is compacted using ultra-high pressure, typically in the range of 400 - 600 bar
- This process forms a solid slab without voids, increases density before firing and creates a stable structure for the sintering stage
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Step 5: Sintering
- The compacted slab is heated in a kiln at 1200 degrees celsius in a process called sintering
- During the process, the particles fuse at the molecular level and the material becomes non-porous similar to glass
- Also becomes heat resistant and chemically stable
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Step 6: Cooling and Finishing
- The sintered slabs are slowly cooled to prevent cracking
- Surface treatments such as polishing, honing and texturing are then applied