GRC Manufacturer Surface Treatment Process: How to Evaluate Key Indicators and Implementation Methods

In the field of architectural decorative materials, surface treatment technology is a key factor determining the quality and application performance of GRC products. As a Qinglong GRC manufacturer with 28 years of industry experience, we deeply understand the importance of a scientific assessment system and rigorous implementation methods for enhancing material performance and ensuring engineering quality. This article provides professional reference for designers, owners, and industry peers from two aspects: analysis of key indicators and full-process implementation methods.

Key Assessment Indicator System for GRC Surface Treatment Technology

Surface treatment of high-quality GRC products must balance aesthetics, durability, and functionality. Qinglong has established quantitative assessment standards across five dimensions. The first is surface flatness: when measured with a 2-meter straightedge, the deviation must be ≤2mm to ensure curtain wall joints achieve a “mirror-grade” visual effect—a standard already applied in benchmark projects such as the Nanjing East Road Century Plaza renovation. The second is color consistency: verified through CIE Lab color space testing, the color difference ΔE of products within the same batch must be ≤3, preventing visual discrepancies from compromising the building's overall aesthetics. This indicator was rigorously validated in the Dongguan Women and Children's Activity Center project.

For texture quality, Qinglong has built a 12-level texture library ranging from imitation stone bush-hammered finish to minimalist matte, with surface roughness Ra values measured by laser profilometry controlled within the 1.6-6.3μm range to meet diverse design style requirements. The weather resistance assessment includes accelerated aging tests (no cracking or chalking after 8000 hours of UV exposure) and freeze-thaw cycle tests (strength loss rate ≤10% after 200 cycles), ensuring product stability under extreme climate conditions. Finally, functional coating adhesion tested by the cross-cut method must meet Class 0 requirements of the GB/T 9286 standard, guaranteeing the long-term performance of fireproof, waterproof, and other coatings.

Full-Process Implementation Methods for Qinglong GRC Surface Treatment

As a national high-tech enterprise, Qinglong integrates surface treatment technology into full lifecycle product management. In the mold preparation stage, high-precision CNC engraving and vacuum replica molding technologies ensure the mold surface finish reaches Ra0.8μm, laying a solid foundation for subsequent treatment. A “three-inspection system” is implemented in production: the first article must undergo full-item inspection by the technical department; during batch production, 1 out of every 20 pieces is sampled for surface performance re-verification; for key items such as flatness, automated inspection equipment replaces manual checks, with data errors controlled within ±0.5mm.

For complex-shaped components, Qinglong innovatively applies 3D scanning and robotic spraying technologies to achieve uniform coating coverage on double-curved surfaces and openwork structures, with coating thickness deviation controlled within ±5μm. In the final quality inspection before shipment, visual defect screening is performed on an intelligent light inspection platform (5000K color temperature, 1500lux illuminance) to ensure freedom from bubbles, pinholes, and other flaws. Notably, the Technical Standard for Building Application of Glass Fibre Reinforced Cement (GRC) (JGJ/T423-2018), for which Qinglong participated in drafting, explicitly incorporates surface treatment technology into the quality acceptance specifications, driving the industry's standardization.

The quality of surface treatment technology directly determines the market competitiveness of GRC products. Leveraging 28 years of technical expertise, Qinglong has introduced aerospace-grade inspection standards into the building materials field, achieving precise control of surface treatment technology through a three-dimensional management system of “indicator quantification + process standardization + technological innovation.” Whether for the exterior wall decoration of landmark buildings or the artistic shapes of cultural venues, Qinglong always upholds a “meticulous and excellence-pursuing” attitude, providing customers with GRC solutions that combine aesthetic value with lasting durability. This is our commitment to industry quality as Vice Chairman Unit of the China GRC Association.