ISO 20645:2004规定了一种测定机织物、针织物和其他扁平织物抗菌处理效果的方法。ISO 20645:2004适用于测试纤维中含有亲水性、透气性材料或抗菌产品的卫生饰面。在本程序中，抗菌处理必须至少扩散到试验琼脂中。ISO 20645:2004适用于其他材料，前提是对其进行相应调整。 ISO 20645:2004不适用于测试经过与琼脂反应的抗菌处理的纺织品。

ISO 20645:2004 specifies a method for the determination of the effect of antibacterial treatments applied to woven, knitted and other flat textiles. ISO 20645:2004 is applicable to testing hygienic finishes of hydrophilic, air-permeable materials or antibacterial products incorporated in the fibre. A minimum diffusion of the antibacterial treatment into the test agar is necessary with this procedure. ISO 20645:2004 is applicable to other materials, provided that it is adapted accordingly. ISO 20645:2004 is not suitable for testing textiles treated with antibacterial treatments that react with the agar.