SIST EN 4057-305:2006

Overview

EN 4057-305:2005 is a CEN-adopted aerospace test method that defines how to determine the colour fastness of coloured cable ties used in harnesses for aerospace applications. Intended to be used together with EN 4057-100 (general test methods), this part specifies the optical exposure procedure and acceptance recording method for coloured cable ties so that colour stability under artificial light can be assessed consistently across suppliers and test laboratories.

Key topics and technical requirements

• Scope: Colour fastness testing for coloured cable ties for harnesses in aerospace environments.
• Test method: Exposure to artificial light using xenon-arc laboratory sources per ISO 4892-2.
• Dosimetry: Radiation dosage is determined using blue dyed wool standards (ISO 4892-2, subclause 5.7.1). Record the wool standard number whose first detectable fading matches the specimen.
• Specimen sampling: Only one size of cable tie per colour needs to be tested.
• Environmental provisions: Test enclosure temperature shall not exceed 40 °C; no humidity control is required.
• Acceptance: The specimen’s colour fastness must meet the requirements specified in the appropriate product standard (i.e., product-specific acceptance criteria are applied after testing).
• Apparatus reference: All equipment and exposure conditions follow ISO 4892-2.

Applications and who should use it

EN 4057-305:2005 is practical for organizations involved in aerospace wiring and harnessing where colour coding, aesthetic stability, and identification are important:

• Aerospace OEMs and subcontractors specifying cable tie performance in procurement documents.
• Cable tie manufacturers and material suppliers validating colour stability of production lots.
• Environmental and materials test laboratories performing standardised colour fastness testing.
• Quality assurance and certification teams verifying compliance with aerospace product standards.
• Maintenance and repair organizations assessing in-service degradation of coloured harness components.

Using this standard helps ensure consistent colour durability data for supply-chain decisions, part acceptance, shelf-life assessment, and conformity with aerospace wiring specifications.

Related standards

• EN 4057-100 - Aerospace series: Cable ties for harnesses - Test methods - Part 100: General
• ISO 4892-2 - Plastics: Methods of exposure to laboratory light sources - Part 2: Xenon-arc sources

Keywords: EN 4057-305:2005, cable ties colour fastness, aerospace test methods, xenon-arc, ISO 4892-2, blue dyed wool standards, EN 4057-100.