CHNSpec Technology （Zhejiang）Co.,Ltd chnspec@colorspec.cn 86--13732210605
On October 31, 2025, the national standard GB/T 46442-2025 “Plastics—Determination of Color Difference of Recycled Plastics” was officially released under the jurisdiction of the National Technical Committee on Plastics of Standardization Administration of China (TC15) and the supervision of the China Petroleum and Chemical Industry Federation. The standard will come into effect on May 1, 2026. This newly issued standard fills the long-standing gap in the unified measurement of color difference in recycled plastics and provides key technical guidance for quality control across the industry. As one of the main drafting organizations, CHNSpec (Zhejiang) Co., Ltd. deeply participated throughout the entire standard formulation process, contributing its technological expertise to promote the standardization of color management within the recycled plastics sector.
Due to the diversity of raw material sources and variations in processing methods, color difference has long been a major challenge restricting the development of the recycled plastics industry—it not only affects product appearance consistency but also limits its application in high-end fields such as automotive, electronics, and packaging. Previously, the industry lacked a unified method for color difference measurement, resulting in low comparability of testing results among different enterprises and creating obstacles for industrial collaboration. The newly established GB/T 46442-2025 standard defines, for the first time, the technical specifications for measuring color differences in recycled plastics, covering testing principles, instrument requirements, operational procedures, and data processing methods, thereby providing companies with a practical, standardized testing solution.
As a leading enterprise in the field of color measurement in China, CHNSpec played a pivotal role in drafting the standard, backed by its deep experience in precision measurement technology development. Since its founding in 2013, the company has focused on innovation in color detection technologies, investing tens of millions of RMB in independent research and development, and has obtained multiple invention patents and software copyrights. Its products—such as precision colorimeters and spectrophotometers—are recognized for high accuracy and exceptional cost performance, consistently maintaining a leading market share. During the drafting process, CHNSpec incorporated its in-depth service experience within the plastics industry and integrated its self-developed high-precision spectral detection technologies (including optimized optical systems and intelligent data algorithms) into the standard, providing strong technical support for key sections such as instrument performance indicators and measurement accuracy requirements, ensuring the standard’s scientific integrity and practical applicability.
“The implementation of this standard will accelerate the transformation of the recycled plastics industry from extensive to refined management,” said a representative of CHNSpec. “Our existing testing equipment already complies with the new national standard and can help enterprises quickly achieve standardized detection, reduce color difference control costs, and improve product consistency—thereby promoting efficient recycling and utilization of plastic resources.” Looking forward, CHNSpec will continue to focus on the field of color measurement, empowering the standardization and technological advancement of more industries through continuous innovation. The company remains committed to supporting green manufacturing and contributing to the realization of China’s ‘Dual Carbon’ goals through technological excellence and data-driven precision.
