How are the results from a Spray Rating Test assessed?
A specified volume of distilled water is sprayed centrally onto an inclined test specimen, and its spray rating is determined by comparing the appearance of the specimen with descriptive standards, or the AATCC Spray Test Rating Chart.
The assessment of spray rating is determined by comparing the appearance of the tested specimen with descriptive standards and photographs, and the AATCC Spray Test Rating Chart is available for this purpose.
A Spray Rating Tester is a simple instrument for evaluating the ability of waterproof fabrics to repel water. James Heal’s Spray Rate tester combines simplicity with serious functionality – the instrument comprises a stainless steel framework, incorporating a funnel. The spray nozzle is mounted on the neck of the funnel. The precision spray nozzle contains 19 holes – one central hole surrounded by two concentric rings of 6 and 12 holes respectively.