ISO 13999-3:2002

Overview

ISO 13999-3:2002 specifies an impact cut test for fabrics, leather and other materials used in protective clothing, gloves and arm guards. The method measures the length of a cut produced when a guided falling block fitted with a straight knife-edge impacts a specimen. Cut length is proportional to blade penetration, providing a repeatable indicator of resistance to stabbing cuts, slashing cuts, shearing cuts and impact cuts - and a useful predictor of performance under severe coarse abrasion (e.g., concrete, road surfaces, razor wire). This test does not assess resistance to penetration by fine points such as thorns or needles. Annex A gives recommendations for specifying the test in product standards.

Key topics and technical requirements

• Test principle: a standard knife in a guided falling block strikes a supported specimen; the resulting cut length (after accounting for specimen thickness) is used to quantify penetration and cut resistance.
• Apparatus components: blade-holding block, straight test blade, specimen support with domed anvil and knife slot, guide rods and electromagnetic release.
• Notable parameters (from the standard):
  • Block + blade mass: (110 ± 5) g
  • Blade protrusion: (55 ± 5) mm
  • Typical impact energy: 0.65 J (drop height ~600 mm for the specified mass)
  • Blade material: cold-forged stainless steel, hardness > 45 HRC; edge finished and checked for straightness/sharpness
  • Specimen mounting: tube form or full gloves/arm guards; a 1 000 g weight piece is clipped to apply ~10 N tension
• Measurements & procedure: measure falling-block velocity near impact to calculate energy; perform multiple impacts at defined separations and orientations; report penetration (mark-to-tip minus thickness) and test conditions.
• Scope limits: suitable for assessing resistance to multiple cutting mechanisms and coarse abrasion, but not suitable for needle/thorn penetration testing.

Applications and users

ISO 13999-3 is used by:

• PPE manufacturers (gloves, arm guards, protective garments) for material selection and design validation
• Independent test laboratories and certification bodies conducting cut resistance and stab resistance testing
• Product standards committees specifying performance levels and test conditions
• Safety managers and procurement specialists specifying protective clothing for industries such as waste collection, construction, motorcycle gear, glass/metal handling, and security

Practical benefits include objective comparison of materials and layered constructions, improved product safety claims, and better prediction of performance under severe abrasion and impact-cut threats.

Related standards

• ISO 13999 series (general title: protective clothing - gloves and arm guards protecting against cuts and stabs by hand knives)
  • ISO 13999-1 (chain-mail gloves and arm guards)
  • ISO 13999-2 (non-chain-mail gloves and arm guards)
• EN 1082-3 (basis for ISO 13999-3)
• EN 388 (protective gloves against mechanical risks)
• ISO 13998 (related impact penetration testing)

Keywords: ISO 13999-3, impact cut test, cut resistance, stab resistance, protective clothing, gloves, arm guards, test blade, anvil, PPE testing.