DMSPL Quality Assurance
Quality Control
Every natural stone slab undergoes rigorous physical testing, dimensional measurement, and visual shade grading before approval for shipment.
Quality Assurance Desk — Multi-Stage Inspection Protocol
Inspection Workflow
Four-Stage Quality Verification
Dimensional & Caliper Inspection
Every cut slab is measured across multiple grid points using digital Vernier calipers and laser systems to ensure exact thickness uniformity and true square edges.
Inspection Criteria
- ±0.5mm Thickness tolerance
- 90° Diagonal squareness
- Edge parallelism check
Glossometer Reflection Rating
Multi-angle digital glossometers measure specular reflection across polished surfaces, ensuring every slab meets or exceeds global luxury architectural standards.
Inspection Criteria
- 95°+ Reflectivity benchmark
- Zero surface hazing
- Uniform sheen distribution
Ultrasonic & Fissure Sounding
High-intensity light tables, dye penetrant tests, and ultrasonic sounding identify internal micro-fractures, air pockets, or hidden structural weaknesses.
Inspection Criteria
- 100% Void detection
- Dye penetrant verification
- Tensile flexure test
Dry-Run Layout & Shade Grading
Slabs from the same block are laid out sequentially in dry runs to inspect background color continuity, vein flow alignment, and natural shade consistency.
Inspection Criteria
- Sequential lot numbering
- Bookmatch alignment
- Photo-documented mapping
Technical Metrics
Standardized Quality Tolerances
| Inspection Parameter | DMSPL Benchmark | Verification Method |
|---|---|---|
| Thickness Tolerance | ±0.5 mm to ±1.0 mm | Multi-Point Digital Caliper Verification |
| Surface Glossiness Rating | 90° to 95°+ Reflectivity | Multi-Angle Digital Glossometer |
| Diagonal Corner Squareness | < 1.0 mm Deviation | Laser Diagonal Corner Verification |
| Structural Soundness | Zero Micro-Fissure Vulnerability | High-Intensity Sounding & Light Penetrants |
| Color & Shade Uniformity | Strict Single-Lot Batching | Full-Lot Dry Run & Photo Mapping |