Spray Rating Tester

Spray Rating Tester

The Spray Rating Tester is a textile testing instrument used to evaluate the water resistance or water repellency of fabric surfaces. It measures how well a fabric can resist wetting when exposed to a controlled spray of water, helping assess its performance in rain or damp conditions.

Purpose of Spray Rating Tester

– To assess surface wetting resistance of textiles.

– Commonly used for outdoor clothing, rainwear, tents, and performance fabrics.

Working Principle of Spray Rating Tester

– A fabric specimen is mounted at a 45° angle.

– Water is sprayed from a standard nozzle for a specific time.

– After spraying, the fabric is visually rated based on the appearance of water drops and wetting.

Key Components of Spray Rating Tester

– Spray Nozzle: Delivers a consistent, standard water spray.

– Funnel & Reservoir: Controls the flow and volume of water.

– Specimen Holder: Positions the fabric at a 45° angle.

– Spray Stand: Ensures accurate nozzle height and positioning.

Standards Used of Spray Rating Tester

– AATCC 22

– ISO 4920

– BS EN 24920

Applications of Spray Rating Tester

– Rainwear and water-resistant textiles.

– Quality control in fabric finishing.

– R&D for performance apparel.

Benefits of Spray Rating Tester:

1. Quick and Simple Evaluation – Offers a fast way to assess fabric water repellency without complex setup.
2. Standardized Testing- Complies with AATCC 22 and ISO 4920, ensuring globally accepted results.
3. Cost-Effective- Low maintenance and no power requirement make it economical for routine lab use.

4. Improves Fabric Performance – Helps manufacturers develop or improve water-resistant textiles.
5. Non-Destructive Test – Does not damage the fabric, allowing for additional tests on the same sample.
6. Visual Grading- Easy to interpret using a standard spray rating chart (0 to 100 scale).
7. Supports Quality Control – Detects finish degradation or variation in water-repellent treatments.
8. Portable and Compact- Lightweight design allows easy use in various lab or field settings.

Features of Spray Rating Tester:

1. Standardized Spray Nozzle – Delivers consistent water spray per AATCC and ISO specifications.
2. 45° Specimen Mounting Angle – Ensures uniform test setup for accurate and repeatable results.
3. Stainless Steel or Aluminum Frame – Corrosion-resistant and durable for long-term use with water exposure.

4. Water Reservoir and Funnel System – Provides precise water volume (usually 250 ml) for each test.
5. Graduated Spray Stand- Fixed height (150 mm above specimen) for controlled spray impact.
6. Detachable Specimen Holder- Easy loading and removal of fabric samples.
7. Compact and Lightweight Design – Portable and convenient for both lab and field testing.
8. No Electricity Required – Fully manual operation increases reliability and reduces operating costs.

How to Use Spray Rating Tester:

1. Prepare the Sample – Cut fabric to standard size (usually 180 × 180 mm). – Condition the sample if required (21°C, 65% RH for 24 hours).
2. Mount the Fabric – Place the fabric on the specimen holder at a 45° angle.
3. Fill the Reservoir – Pour 250 ml of distilled water into the upper funnel.

4. Start the Test – Release the water through the nozzle; it sprays over the fabric for about 25–30 seconds.
5. Inspect the Fabric – After spraying, visually assess the water beading or penetration on the surface.
6. Rate the Sample – Compare the fabric’s wetting pattern with the standard spray rating chart: – 100 = No sticking/wetting – 90–50 = Partial wetting – 0 = Complete wetting
7. Record the Rating – Document the spray rating for quality control or reporting.

Spray Rating Tester,
Water Repellency Tester
Spray Reting Tester

[Scope of application]:
Used for the determination of moisture resistance (wetting grade) of various fabrics
which have been or have not been treated with water resistance or water repellency.
[related standards]:
GB/T4745 ISO4920 AATCC22 JISL1092 etc.
[technical parameters]:
1. Glass funnel:150 x 150 (capacity 500ml)
2. Specimen placement angle:The level is 45 degrees.
3. Distance from nozzle to sample center:150mm
4. Specimen diameter:Ф150mm
5. Size of water receiving pan:500×400×30mm
6. Matching measuring cups:500ml
7, size 500 x 400 x 500mm
8. Instrument weight:5Kg