The colour fastness is usually rated either by loss of depth of colour/ colour change in oriWASH-FASTNESS
The dyed samples were washed in the Launder o meter Laboratory apparatus according to EN ISO 105-C06 standard. The size of the sample was 100 x 40mm, the wash bath contained 4 g/l ECE phosphatereference detergent B, the volume of the bath was150 ml, the temperature of the bath was 40°C and time of washing 45 minutes. Ten stainless steel globules were added into each bath to perform washing, which corresponds to five domestic washings. After washing, the samples were rinsed twice in deionised water and air dried at room temperature.