In February 2026, the research and testing system for tack, a core performance of adhesives, has attracted wide attention in the industry. Tack refers to the instantaneous adhesiveness of an adhesive when it contacts a surface, a composite property formed by the joint action of two stages: wetting and debonding, which cannot be defined by absolute units. Its performance is affected by formula components such as polymers, tackifying resins and rheological additives, and external conditions like temperature and contact pressure can also change test results. To achieve quantitative evaluation, institutions such as ASTM and FINAT have formulated standardized testing methods, including ball roll, loop, peel and probe tack tests. Among them, the ball roll test is low-cost and suitable for production quality control; the probe tack test features high precision and can obtain multi-dimensional data, which is mostly used in laboratory research. Different testing methods have their own advantages and disadvantages, and need to be selected comprehensively according to application scenarios, precision requirements and costs. Standardized testing has also become an important link in the R&D, production and application of adhesives, providing a scientific basis for formula optimization. For more information, please click: https://www.tiktok.com/@mia_iota/video/7597717976720149782