ISO 14419:2025 – Required Testing Instruments

ISO 14419:2025, “Textiles – Oil repellency – Hydrocarbon resistance test”, specifies a laboratory method to evaluate a textile substrate’s resistance to absorption of standard hydrocarbon liquids with different surface tensions. The test provides an oil repellency grade, which is a practical index of oil stain resistance for fabrics and finishes. It is widely used for quality assurance, R&D, and comparative testing.

Test Principle

(1) Sequential application of standard hydrocarbon liquids (numbered to indicate decreasing surface tension) onto textile specimens.

(2) Observe for wetting, wicking, and contact angle at multiple test sites.

(3) The highest-numbered liquid that does not wet the substrate within 30 seconds determines the oil repellency grade.

(4) Assessment can be visual or instrumental for precise contact-angle measurement.

Specimen Preparation

(1) Cut three specimens per material, approximately 35 cm × 35 cm.

(2) Condition specimens at 20 ± 2 °C and 65 ± 4 % RH for at least 4 hours (per ISO 139).

(3) Place specimens on white textile blotting paper of defined thickness, absorbency, and fibre composition.

(4) Ensure surfaces are clean, dry, and silicone-free.

Required Instruments

(1) Dropping Bottles / Pipettes – 5 mm diameter (0.05 ml) precision droppers, clearly labelled for each numbered test liquid.

(2) Standard Hydrocarbon Test Liquids – White mineral oil (CAS RN 8042-47-5) and series of n‑alkane liquids/mixtures with decreasing surface tension.

(3) Textile Blotting Paper – White paper with defined thickness, weight, and absorbency.

(4) Timer or Stopwatch – Accuracy ±1 s for measuring 30-second wetting interval.

(5) Conditioning Chamber – Maintains 20 ± 2 °C and 65 ± 4 % RH for specimen preconditioning.

(6) Spectrophotometer / Contact Angle Measurement Device (Optional) – For precise evaluation of wetting and wicking behaviour.

(7) Personal Protective Equipment (PPE) – Gloves, goggles, lab coat; hydrocarbons are flammable and volatile.

(8) Fume Hood / Well-Ventilated Area – Ensure safe handling of flammable liquids.

Test Procedure

(1) Place conditioned specimen on blotting paper.

(2) Apply 0.05 ml drops of the lowest-numbered hydrocarbon at five representative sites.

(3) Observe for 30 ± 2 seconds; record wetting or wicking.

(4) Repeat with higher-numbered liquids until wetting occurs.

(5) Determine oil repellency grade as the highest-numbered liquid not absorbed.

(6) Document all data, including specimen ID, conditioning details, observations, and deviations from standard procedure.

Applications & Users

(1) Textile Manufacturers & Finish Formulators – Compare oil-repellent finishes and coatings.

(2) R&D Teams – Evaluate durability of finishes after washing or drycleaning (ISO 6330 / ISO 3175).

(3) Independent Test Laboratories – Perform standardised, repeatable comparative tests.

(4) Brands & Specifiers – Assess oil repellency performance for garment, upholstery, or technical textile products.

(5) Quality Assurance & Compliance Teams – Ensure regulatory or specification requirements for oil stain resistance.

Related Standards

(1) ISO 139 – Conditioning and testing atmosphere for textiles.

(2) ISO 6330 – Domestic washing procedures for textile testing.

(3) ISO 3175 – Drycleaning procedures.

(4) ISO 6530 – Resistance to penetration by liquids (oil-based chemicals).

Qinsun Instruments is a professional instrument equipment manufacturer, offering a one-stop solution for all your textile testing needs. Contact us today to explore complete testing setups for ISO 14419:2025 and ensure accurate, reproducible evaluation of oil repellency in textiles.

2026-01-06 17:24