Spray Impact and Rain Tower Penetration
topic
The spray test (AATCC 22, ISO 4920) directs a standardised water spray onto a fabric surface and grades water beading against photographic references; rain tower tests simulate continuous rainfall at defined intensity and duration, measuring water penetration through fabric by weighing absorbent pads on the reverse side.
Role
Validates water repellency and waterproofing of treated apparel and technical fabrics under dynamic wetting conditions that more closely resemble real rainfall exposure than static hydrostatic head pressure tests.
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