Overview of cotton impurity content testing and ASTM D2812 and BS 2889
Cotton inevitably contains various impurities during its natural growth, harvesting, storage, transportation, and processing due to various reasons. These impurities not only affect the quality and price of raw cotton but also significantly impact the production and economic benefits of textile mills. Therefore, several major cotton-producing and consuming countries in the world, including China, have established detailed standards for testing cotton impurity content to regulate related matters in commercial practices and scientific research. The following is a brief introduction and analysis of the standards and instruments used for measuring impurity content in cotton outside of China.