Purpose and Goals
- Evaluate and compare the water repellencies of multiple textiles in laboratory-controlled spray testing.
Testing
- Textile swatches will be secured into a 15.24 cm diameter hoop on a 45° incline with the face-side up and without wrinkles. 250 mL distilled water (27 °C) will then be sprayed onto the inclined surface through a standard 19-hole nozzle at a height of 15 cm from the center of the swatch. The hoop will be removed from the spray apparatus, tapped twice (once face-down, then once face-up), and then immediately rated (1-100) for wetting against the standard chart by two independent evaluators.
- Testing will include 9 total data points:
- 3 materials (such as textile A, textile B, textile C)
- Note: Please provide at least 1.5 square meters of each material.
- 3 replicates per sample at each test condition
- 3 materials (such as textile A, textile B, textile C)
- Optional: Testing will include representative photos of each tested material for an additional fee.
- Optional: Alternate liquids (such as blood, vegetable oil, or bleach) are available for an additional fee.
- Note: Optional GLP services are available for an additional fee.
Data Analysis
- Individual ratings and averages will be reported for each test material.
Link: https://www.aatcc.org/the-art-of-testing-water-repellency/