How to Solve GRC Decorative Panel Color Difference: Cause Analysis and Effective Solutions

In the field of architectural decoration, GRC decorative panels are widely used in high-end projects such as grand theaters, commercial complexes, and landmark buildings, thanks to their lightweight, high-strength, and richly formable characteristics. However, color difference has become a common challenge affecting both their aesthetic appeal and engineering quality. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group draws on practical expertise in deepened design, manufacturing, and construction installation to analyze the root causes of color difference and provide systematic solutions, helping designers and owners achieve precise presentation of architectural aesthetics.

I. Analysis of the Core Causes of Color Difference in GRC Decorative Panels

The color difference problem in GRC decorative panels is not caused by a single factor, but is the result of the combined effects of multiple stages including materials, processes, and environment. At the raw material stage, fluctuations in cement grade, differences in glass fiber brands, and insufficient stability of pigment batches can all cause deviations in the matrix color. During production, uneven mixing time and insufficient precision in water-cement ratio control lead to variations in slurry density, resulting in inconsistent surface shades. Meanwhile, temperature and humidity variations during the curing stage and differences in lighting conditions are key variables that aggravate color difference. In addition, differences in substrate treatment and improper joint treatment techniques during construction and installation may also cause visual color differences in the final result.

II. Full-Chain Color Difference Control: Qinglong's Systematic Solutions

To tackle the color difference challenge of GRC decorative panels, Qinglong leverages its R&D strength as a national-level high-tech enterprise and its full-chain service advantages to build a three-tier control system of "source control - process precision control - terminal optimization." In the deepened design stage, BIM technology is used to simulate color effects, combined with the project's actual ambient light parameters, to establish color difference tolerance standards in advance. In the manufacturing stage, automated batching systems achieve precise control of raw materials, a pigment batch sample retention and comparison mechanism is established, and constant temperature and humidity curing kilns are introduced to ensure a stable curing environment. Notably, the Technical Standard for Building Application of Glass Fibre Reinforced Cement (GRC) (JGJ/T423-2018), which Qinglong participated in drafting, clearly specifies color difference testing methods and control indicators, providing technical specifications for the industry.

At the construction and installation level, Qinglong's professional team uses 3D laser scanning technology to achieve precise substrate leveling and adopts customized joint treatment techniques to reduce visual breaks. For minor color differences that have already appeared, localized repairs are carried out with special color-matching slurries to ensure overall consistency. This solution has been validated in projects such as the Nanjing East Road Century Plaza renovation project, which won the Silver Award at the First UHPC Construction Engineering Innovation Award of the AALBORG WHITE Cup, achieving the industry's high standard of △E≤3 in color difference control precision for its complex curved GRC components.

III. Long-Term Quality Assurance: From Project Delivery to After-Sales Maintenance

As a national "specialized, refined, distinctive, and innovative" enterprise, Qinglong understands that color difference control is not only a technical issue in production, but also a quality commitment across the entire life cycle. The company has established a comprehensive product quality traceability system, recording the production information and quality inspection data of each GRC decorative panel via RFID chips to provide a basis for later maintenance. During the after-sales maintenance stage, customized care recommendations are provided for different climate regions—for example, seasonal color difference inspections are recommended in northern regions with large temperature variations, while waterproof coating maintenance is strengthened in humid southern regions—ensuring that GRC decorative panels maintain a stable visual appearance over the long term.

Color difference control is a direct reflection of the quality of GRC decorative panels and, more importantly, a comprehensive test of a material supplier's technical strength and service capability. Building on 28 years of industry experience, Qinglong Group applies the philosophy of "meticulousness and striving for excellence" throughout the entire process of deepened design, manufacturing, and construction installation. Through technological innovation and standardized management, it safeguards designers' creative realization and provides owners with durable and beautiful architectural decoration solutions. As the vice president unit of the China GRC Association and a member of the International GRC Association, Qinglong is always committed to advancing industry technology and fulfilling its mission of "creating beautiful architecture" with professional strength.