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

Visual consistency in architectural decoration is key to bringing a design to life, yet color difference in GRC decorative panels often becomes an "invisible pain point" that affects project quality. As an industry participant with 28 years of dedicated experience in UHPC/GRC/GRG/GRP materials, Qinglong Group leverages its full-chain technical expertise to develop a systematic color difference control solution spanning material formulation and construction management, helping designers and owners achieve a precise presentation of architectural aesthetics.

**Root Cause Analysis of Color Difference in GRC Decorative Panels: Multi-Dimensional Influences from Materials to Environment**

Color differences in GRC decorative panels typically involve multiple stages of the entire production process. Raw material variation is the primary factor: differences in cement grade, changes in glass fiber performance between batches, and even fluctuations in the mineral composition of sand and gravel aggregates can all lead to deviations in matrix color. At the production process level, uneven material mixing caused by insufficient mixing time, release agent contamination from inadequate mold cleanliness, and drastic changes in temperature and humidity in the curing environment all directly affect the color consistency of the finished surface. Notably, even products from the same batch may produce visually perceived color differences if, at the installation stage, they are exposed to different lighting conditions or contamination.

**Full-Chain Color Difference Control Solution: Qinglong's Technical Practice Rooted in 28 Years of Craftsmanship**

To address color difference issues, Qinglong has established a three-tier solution of "source control + process supervision + final optimization." In raw material management, a "designated procurement + incoming re-inspection" system is implemented, with color value testing and small-sample trial mixing conducted for key materials such as cement and fibers to ensure the performance stability of every raw material batch. During production, automated mixing systems ensure uniform material blending, constant temperature and humidity curing kilns control the hardening environment, and color difference meters are introduced for online monitoring, keeping color difference values strictly within the industry-leading standard of △E≤3.

For color difference management in complex projects, Qinglong's detailed design team plays a key role. BIM technology is used to optimize component segmentation and reduce the number of joints between products of different batches; before construction and installation, on-site pre-layout is organized, with all GRC decorative panels numbered and pre-screened for color difference. For outdoor applications, surface treatment processes are also adjusted according to building orientation and lighting angles to reduce the influence of environmental factors on color perception.

**Industry Experience and Innovative Practice: From Standard Development to Technical Breakthroughs**

As a participating developer of the Technical Standard for the Building Application of Glass Fiber Reinforced Cement (GRC), Qinglong has incorporated color difference control requirements into its corporate standard system, implementing stricter quality controls ahead of industry regulations. In the Nanjing East Road Century Plaza renovation project, the use of customized pigment formulations and translucent concrete composite technology successfully achieved a harmonious color transition between GRC decorative panels and the glass curtain wall; the project won the Silver Award of the AALBORG WHITE Cup UHPC Construction Engineering Innovation Award.

Solving the color difference problem of GRC decorative panels is, in essence, a comprehensive test of materials science, production technology, and engineering management. Supported by 28 years of full-chain experience, Qinglong Group upholds technological innovation and quality control throughout, not only providing customers with decorative components that meet aesthetic requirements, but also helping to enhance the overall quality and value of building projects through standardized color difference solutions. In the field of new architectural decoration materials, this relentless pursuit of detail is a vivid embodiment of Qinglong's mission to "create beautiful architecture."