Fig. 3.

Total number of fibers released from 100 cm² of fabric per wash, when fabrics were washed with water alone or with a commercially available detergent. Fabrics tested: acrylic (A1), and polyester (PET) fleece (FL) or microfleece (MF) fabrics, commercially produced by Polar Tech (Pt) or Tenson (T). Results are presented in box plots showing median, 25th and 75th percentiles, max and min. Statistically significant differences between washes (with or without detergent) for each fabric are indicated by *, (p < 0.05). n = 6