soaping fastness meaning in English

耐皂洗牢度
耐皂洗色牢度

Test methods of soap fastness for printed and dyed fabrics
印染布皂洗牢度试验方法
The results showed that the directly dyed samples had rate 3 ~ 4 rubbing and soaping color fastnesses , and the iron mordant dyed ones had rate 4 rubbing and soaping fastnesses
试验结果表明：直接染色样品的摩擦色牢度3 ~ 4级，皂洗色牢度3 ~ 4级，铁媒染后摩擦色牢度和皂洗色牢度提高为4级。
The color shade , soaping fastness , and fastness to robbing of the dyed samples by both traditional and new technique were tested and the results showed that the new technology can live up to the standard of the traditional dyeing and protect the environment as well
在传统工艺和新工艺条件下对染色样进行色光、皂洗牢度和摩擦牢度测试，结果表明新工艺既达到了传统工艺染色标准又利于保护环境。