softener 3 kg of the test fabric 34 duosoft 34 fabric 100 cotton supplier vossen are washed 2 u00d7 100 g of test detergent and then twice without detergent in each case 95 u00b0 c program with prewash time approximately 2 h spinning speed 1200 rpm a fixed predetermined liquor volume of 15 l miele w 719 results in a liquor ratio of 5 1 after washing the test fabric is hung up to dry at room temperature for one day and then stored at room temperature until treated to immerse the fabric the calculated amounts of the fabric softener are introduced into the beakers at 15 20 u00b0 c and made up to 2 l with tap water which has a german hardness of about 90 and is at 15 20 u00b0 c the mixture is then stirred on a magnetic stirrer until homogeneous dispersions or solutions form a control is carried out by introducing only tap water in the immersion bath one section of test fabric is immersed per rinsing bath after 10 min the fabric is taken out of the rinsing bath lightly wrung out lightly shaken three times and hung up to dry as a single layer for 48 h at room temperature the test fabric treated in this way is cut into 10 equal sections about 16 u00d7 25 cm each test subject is given a new test section for assessment it is important to prevent the test sections from becoming 34 soft through handling.