SIST EN ISO 8442-5:2005 PDF

Overview

EN ISO 8442-5:2004 (CEN) specifies a reproducible test method for sharpness and edge retention of hand knives used in food preparation. The standard applies to domestic and professional cutlery (plain or profiled edges) and excludes powered blade instruments. The test reproduces a cutting action using forward and reverse strokes against a synthetic test medium under controlled conditions to quantify initial cutting performance (ICP) and cutting edge retention (CER).

Key topics and requirements

• Scope: Hand-use knives for all food types; both re-sharpenable (Type A) and non–re-sharpenable or fine-pitched edges (Type B).
• Test principle: Repeated forward + reverse strokes of the blade against a packed strip of synthetic abrasive card; depth of cut per cycle is measured and accumulated.
• Test medium: Chemical soda pulp card containing (5 ± 0.5) % silica (quartz) abrasive, cut into 10 mm strips, conditioned at (20 ± 2) °C and (55 ± 5) % RH before use.
• Apparatus essentials: card strip holder (10 mm aperture, clamped at 130 ± 2.5 N), transverse and longitudinal frictionless slides, blade fixture (edge uppermost), displacement transducer (resolution 0.1 mm), and a drive producing a nominal 50 mm/s cutting speed.
• Test parameters: nominal test load 50 N; stroke length 40 mm; Type A - 60 cutting cycles; Type B - 200 cutting cycles.
• Performance indicators:
  • ICP = cumulative depth cut after first 3 cycles (minimum 50 mm required)
  • CER / TCC = total card cut over full test (minimums: Type A ≥ 150 mm; Type B ≥ 1 500 mm)
• Calibration: Annex A covers calibration of force, speed, position and verification using a standard blade to ensure consistent results.

Applications

• Product development and material selection for cutlery blades (steel grades, coatings, edge geometries).
• Quality control and manufacturing acceptance testing to validate sharpness claims.
• Comparative benchmarking between knife designs or suppliers.
• Supporting marketing claims and conformity documentation for cutlery intended for food contact.
• Test laboratories and certification bodies assessing cutlery performance.

Who should use this standard

• Cutlery manufacturers and R&D teams
• Quality assurance and compliance departments
• Third‑party testing laboratories and certification bodies
• Procurement specialists specifying performance requirements for commercial kitchens and retail products
• Regulatory or standards professionals working on food contact materials

Related standards

• EN ISO 8442 series (Parts 1–8) covering broader requirements for cutlery and table hollowware, material-specific requirements and plating specifications.

Keywords: EN ISO 8442-5:2004, ISO 8442-5, cutlery sharpness test, edge retention test, knife sharpness, cutlery testing, food contact standards.