OEM Matte Black Quartz Countertops

Material Composition and Structure

Engineered quartz surfaces consist of approximately 93% ground natural quartz aggregate bound by 7% unsaturated polyester resin. The mineral fraction provides inherent hardness, while the resin matrix contributes flexibility and allows pigment dispersion. This combination yields a non‑porous slab with a uniform microstructure that resists liquid penetration.

Typical bulk density ranges from 2.2 to 2.4 g/cm³, measured via ASTM C97. The mineral filler’s particle size distribution is controlled to achieve a consistent surface finish after polishing, which is essential for achieving a matte appearance without gloss variation.

Manufacturing Process

Raw quartz and resin are mixed under vacuum to eliminate entrapped air, then poured into steel molds. The mixture undergoes vibration compaction at 0.5 g for 60 seconds to achieve optimal particle packing.

Following compaction, the slab is cured in a temperature‑controlled oven at 85 °C for 45 minutes, allowing the resin to cross‑link fully. Post‑curing, the slab is calibrated to thickness tolerance ±0.5 mm and transferred to a polishing line where a series of diamond abrasives produce a matte finish measured at 5–10 gloss units (ASTM D523).

Performance Characteristics

Customization Options

• Slab thickness: 12 mm, 18 mm, 20 mm, 30 mm (custom upon request)
• Edge profiles: eased, beveled, bullnose, ogee, waterfall (CNC‑machined)
• Size format: standard jumbo (3200×1600 mm) or cut‑to‑size panels
• Surface treatment: matte, honed, brushed, or anti‑fingerprint coating
• Color matching: custom pigment batches for specific RCS or PMS references

Industrial Applications

In laboratory environments, the low water absorption and chemical resistance of quartz countertops prevent swelling or staining when exposed to reagents such as acids, solvents, and buffers. The matte finish reduces glare under bright illumination, improving visual comfort for detailed work.

For hospitality and retail fixtures, the high compressive strength supports heavy equipment loads without deflection, while the non‑porous surface simplifies cleaning protocols required by health codes. The ability to replicate consistent color across large installations ensures brand‑standard appearance.

Quality Assurance and Testing

Each production lot undergoes dimensional verification using laser scanning to confirm thickness and flatness within ±0.2 mm. Surface hardness is checked with a Shore D durometer, targeting values between 80 and 85.

Chemical resistance is validated by immersing samples in representative cleaning agents for 7 hours and measuring any weight change or visual alteration. Only batches meeting all criteria are released for shipment.

Packaging and Logistics

Finished slabs are interleaved with low‑density polyethylene sheets and placed on steel‑frame pallets rated for 2 tonnes. Corner protectors and stretch‑film wrapping prevent edge damage during transit.

Pallets are labeled with batch numbers, thickness, and destination codes, enabling traceability from factory to installation site. Standard export packaging complies with ISPM‑15 wood‑treatment regulations.