本标准旨在促进工业和商业从传统纱线编号系统向Tex系统（CAN2-4.159.75）的转变。它在Tex系统中提供了一系列推荐的四舍五入线密度，以取代表3中提到的六种主要传统编号系统中的纱线编号，并涵盖了目前生产的绝大多数纱线。表3中未涵盖的计数系统（例如Dewsbury计数）的四舍五入tex值可通过应用转换表所依据的原则来确定，即使用CAN2中的相关转换系数- 4.159.75给出精确的Tex系统当量，然后选择一系列四舍五入的数字，这些数字与精确当量的差异尽可能不超过2%。

This standard is intended to facilitate the change-over by industry and commerce from traditional yarn numbering systems to the Tex System (CAN2-4.159.75).It provides a range of recommended rounded linear densities in the Tex System to replace the yarn numbers in the six main traditional numbering systems referred to in Table 3 and covers the great majority of yarns currently produced.The rounded tex values for count systems not covered by Table 3 (e.g. Dewsbury count) may be ascertained by applying the principle on which the conversion table is based namely by using the relevant conversion factor from CAN2-4.159.75 to give the exact Tex System equivalents and then choosing a range of rounded numbers which are, as far as possible, not more than 2% different from the exact equivalents.