Dyeing

Polyamide 6

Polyester

(1) Public supply water with citric acid 0.5 g/L

0.50 ± 0.21

0.39 ± 0.11

(2) Public supply water with acetic acid 0.5 g/L

and sequestering agent^a 0.5 g/L

0.84 ± 0.16

0.29 ± 0.08

(3) Hard water (with CaCO₃ 200 mg/L)

with acetic acid 0.5 g/L

0.94 ± 0.11

0.24 ± 0.06

(4) Hard water (with CaCO₃ 200 mg/L)

with citric acid 0.5 g/L

0.77 ± 0.10

0.26 ± 0.02

(5) Hard water (with CaCO₃ 200 mg/L) with

acetic acid 0.5 g/L and sequestering agent^a 0.5 g/L

1.07 ± 0.13

0.31 ± 0.05