The 6-Stage Export Quality Assurance Protocol
In international stone trade, a single flawed slab can derail installation schedules on high-value architectural projects. That is why every square meter manufactured at Sheen Overseas undergoes six rigorous verification gateways before container loading:
Optical Raw Silica Sorting
High-speed digital optical color sorters inspect raw crystalline silica grains under ultraviolet illumination to eliminate dark iron flecks, mica inclusions, and organic contaminants prior to resin mixing.
Vacuum Vibro-Compaction & Degassing
Automated sensors monitor vacuum pressure (≤20 mbar) and 100-ton hydraulic compaction forces in real-time, verifying total expulsion of trapped air voids to guarantee zero open porosity (<0.02% water absorption).
Ultrasonic Thickness Calibration
Continuous ultrasonic thickness mapping monitors slabs across multi-spindle diamond milling lines, maintaining exact nominal thickness (15/20/30mm) within a tight ±0.5 mm tolerance limit.
1200-Lux Daylight Vein Verification
Every single slab is visually audited in a dedicated lighting bay under 1200-lux 5000K daylight-balanced illumination. Inspectors verify vein continuity, shade batch homogeneity, and absence of micro-scratches.
Laboratory Mechanical Testing
Sample test coupons from each kiln run undergo flexural modulus of rupture testing (≥45–55 MPa under EN 14617-2), Mohs hardness verification (6.5–7), and falling steel ball impact resistance testing (≥2.5 Joules).
ISPM-15 Crating & Container Staging
Export packaging utilizes heat-treated and fumigated pine timber A-frames with high-tensile steel banding, corner edge guards, and industrial silica desiccant canisters to prevent transit breakage and condensation rust.
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