AATCC test method 193-2007 evaluates the treated fabric resistance
to wetting with a series of eight water/alcohol solutions with
varying surface tensions. To investigate the water/alcohol repellency,
drops of standard test liquids are placed on the fabric surface and observed
for wetting and wicking. The repellency is graded according to
the highest numbered test liquid from 1 to 8 that does not flow to the
fabric surface within 30 s.