GB/T 15338 - 2008 focuses on the confirmation of precision and deviation of carbon black test methods. It details how to evaluate the accuracy of various carbon black test methods, covering test design, data collection and analysis processes. Through standardized operation, determine the reliability of the results obtained by different test methods, and clarify the precision range and deviation. Provide unified evaluation criteria for carbon black production enterprises, testing institutions and R & D institutions to ensure the accuracy of carbon black test data, make mass judgment and Product Research & Development based on these data more scientific, and effectively promote the standardization of carbon black industry testing work.