着色试验 meaning in English

paint test
staining test

Test method for identification of textile fibres . dye and stain tests
纺织纤维鉴别试验方法着色试验方法
Pesticide - guidelines for the field efficacy trials - part 144 : plant growth regulator trials on pigmentation of apple
农药田间药效试验准则二第144部分：植物生长调节剂促进苹果着色试验
Soils : investigation and testing . measuring of the methylene blue adsorption capacity of ? rocky soil . determination of the methylene blue of ? soil by means of the stain test
土壤.调查和试验.岩石类土壤亚甲基蓝吸收能力测量.着色试验法测定土壤的亚甲基蓝值