Precision Quality Control: Our Commitment to Excellence

At John Moncrieff Ltd, quality isn’t just a commitment — it’s built into the DNA of every process. With over 150 years of precision glass manufacturing heritage, we uphold rigorous quality control standards that ensure every quartz product meets and exceeds international benchmarks.

Our Comprehensive Quality Assurance

• Dual-Layer Inspection System:
  • Meticulous in-house quality control protocols.
  • ISO 9001-certified manufacturing processes.
  • Industry-leading precision tolerances of ±0.01 mm.
• Advanced Measurement Technologies:
  • State-of-the-art Coordinate Measuring Machines (CMM).
  • High-precision digital scanning for dimensional verification.
  • Detailed QC and inspection reports available upon request.
• Semiconductor-Grade Standards:
  • Maintained in a certified Class 1000 cleanroom environment.
  • Advanced CMM scanning and digital reporting capabilities.
  • Customised inspection and measurement protocols for client-specific requirements.
• Third-Party Verification:
  • External quality audits welcomed and supported.
  • Full transparency throughout inspection and validation processes.
  • Independent verification to ensure dimensional and optical compliance.

Every critical dimension is measured, recorded, and verified through a robust traceability framework. For semiconductor and scientific applications, our Class 1000 cleanroom and comprehensive CMM reporting guarantee precision to the highest standard.

Trust in quality that’s measured, verified, and guaranteed. John Moncrieff Ltd — defining excellence through precision.