The control tests were carried between ATS, a leather special and nonpoisonous dyestuff produced by Luoyang Ruifeng Industrial and Limited Company, and foreign similar products.

• 通过对洛阳瑞丰工业有限公司研制生产的皮革专用无毒染料皮革黑ATS与国外同类产品进行的试验对比，指出了该染料的优缺点。