4 cm Quartz Countertop Supplier – Technical Overview

Quartz countertops are engineered stone surfaces made from natural quartz crystals bound with polymer resins and pigments. A nominal thickness of 4 cm provides increased rigidity for spans exceeding 600 mm without additional support, reducing deflection under load.

Material Composition and Properties

Typical slabs contain 90‑95 % ground quartz by weight, with the remainder consisting of unsaturated polyester resin, pigments, and minor additives. This composition yields a bulk density of approximately 2.3 g/cm³, a Mohs hardness of 7, and a flexural strength ranging from 40 to 55 MPa depending on resin cure conditions.

Dimensional Specifications and Tolerances

The nominal thickness is 40 mm with a permissible tolerance of ±0.5 mm across the slab surface. Length and width tolerances are generally ±2 mm for standard sizes up to 3200 mm × 1600 mm, while custom cuts maintain ±0.5 mm accuracy when processed with CNC equipment.

Typical Dimensional Tolerances

Manufacturing Process

Raw quartz aggregate is blended with resin and pigments under vacuum to eliminate air bubbles. The mixture is then vibro‑compacted into a mold, cured at elevated temperature (≈80 °C) for a controlled period, and finally polished with sequential diamond abrasives to achieve the desired surface finish.

Quality Control and Inspection

Each slab undergoes multiple checkpoints: thickness verification with laser gauges, flatness measurement using a straightedge and feeler gauge, color consistency assessment under standardized lighting, and resin cure verification via DSC analysis. Defects such as pits, cracks, or resin‑rich zones trigger automatic rejection.

• Thickness variance ≤ 0.5 mm
• Surface flatness ≤ 0.3 mm over 1 m
• Color ΔE ≤ 2 units (CIELAB)
• Water absorption ≤ 0.02 % (ASTM C97)

Applications in Industrial and Commercial Settings

The added stiffness of a 4 cm slab reduces vibration in high‑precision equipment bases and allows longer unsupported spans in laboratory workstations. In food‑processing environments, the non‑porous surface resists bacterial growth and withstands frequent cleaning with alkaline detergents.

Customization Options

Clients can specify edge profiles such as eased, beveled, bullnose, or ogee, with radii ranging from 3 mm to 20 mm. CNC machining enables cut‑outs for sinks, cooktops, and service holes, while surface finishes can be polished, honed, or textured to meet slip‑resistance ratings.

• Edge profiles: eased, beveled, bullnose, ogee, waterfall
• Cut‑out shapes: rectangular, circular, custom CAD‑driven
• Finish types: polished (gloss > 80), honed (gloss 20‑40), brushed
• Thickness variants: 2 cm, 3 cm, 4 cm (custom upon request)

Technical Specifications

Frequently Asked Questions

Can the slab thickness be adjusted for specific load requirements?

Yes, while 4 cm is standard for most structural spans, thicker slabs (up to 6 cm) can be produced upon request, and thinner options are available for lightweight applications where support is provided.

What information is needed to obtain a quotation?

Provide overall dimensions, desired edge profile, cut‑out locations, finish type, and any required certifications (e.g., NSF, Greenguard). A layout drawing or DXF file accelerates the quoting process.

How are slabs protected during export shipment?

Slabs are packed in vertical A‑frames with corner protectors, interleaved with polyethylene foam, and secured with steel straps. The package is then placed in a fumigated wooden crate meeting ISPM‑15 standards.

Request a Quote or Sample

To discuss your project requirements, obtain a formal quotation, or arrange a physical sample, please use the contact link below. Our technical team will respond with lead times, pricing, and any necessary documentation.

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