T29C: Water Repellency - Spray Rating

AWTA TEST CODE

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T29C

OTHER NAMES

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TEST METHODS

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AATCC 22
AS 2001.2.16
BS 3702
DEF 5037-A20
ISO 4920

IMAGE

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Spray Rating Test In Progress

APPLICATION

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This method is applicable to all fabrics which may or may not have been given a water repellent finish or coating. It is not intended for use in predicting rain penetration resistance of fabrics, since it does not measure penetration of water through the fabric.

PRINCIPLE

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A test specimen is subjected to a water spray under controlled conditions and the degree of surface wetting is assessed.

SAMPLES REQUIRED FOR TESTING

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The fabric sample should be approximately 1.5m² in area. This sample should NOT have been cut within 2m of the lead end or tail end of the fabric piece, roll or lot.

INTERPRETATION

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Ratings are as follows:

100 - No sticking or wetting of the upper surface

90   - Slight sticking or wetting of the upper surface

80   - Wetting of upper surface at the spray points

70   - Partial wetting of the whole of upper surface

50   - Complete wetting of the whole of upper surface

0     - Complete wetting of the whole of upper and lower surface

SERVICE TARGET

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6 days.

COST

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See Fee List.