BS EN ISO 12311:2023
Personal protective equipment. Test methods for sunglasses and related eyewear
- Standard No.
- BS EN ISO 12311:2023
- Release Date
- 2024
- Published By
- British Standards Institution (BSI) GB / BSI
- Latest
- BS EN ISO 12311:2023
- Introduction
Analysis of the core content of the standard
BS EN ISO 12311:2023 is the UK's national implementation standard for EN ISO 12311:2023, which completely replaces the 2013 version of the standard. This standard specifies the test methods for sunglasses and related eyewear products, and is used in conjunction with the ISO 12312 series of standards.
Major Technical Changes
Dimensions of Changes 2013 Edition 2023 Edition Source of Test Methods Complete Test Methods References to ISO 18526 Series of Standards Head Model Specifications Detailed Provisions Deleted, Moved to ISO 18526-3 Retained Test Items All Only frame-specific methods retained
Detailed explanation of key test methods
6.1 Frame deformation and lens retention test
Use a ring fixture and pressure bolt device to apply a maximum force of 5N or a displacement of 10% of the lens spacing at the center of the lens, and measure the permanent deformation rate after holding for 5 seconds. The qualified standards are:
- Deformation rate ≤2%
- No lens falling off or partial displacement
- No visible cracks in the frame
6.2 Enhanced durability test
Mechanical fatigue test simulating wearing action:
- Fix one temple and make a 60mm diameter circular motion on the other side
- After 500 cycles of testing
- The change in the distance between the measuring points is ≤5mm
6.3 Sweat resistance test of the frame
Use artificial sweat (lactic acid + sodium chloride) to test in two stages:
Phase 1 (8 hours): Check the overall appearance changes, exclude the joints and screws
Phase 2 (total 24 hours): Focus on detecting corrosion or coating separation at skin contact areas (inside of temple, lower part of lens ring, inside of nose bridge)
Implementation recommendations
Laboratory preparation
- Update test equipment to meet the specifications shown in Figure 1-5
- Establish artificial sweat preparation process (ISO 3696 Grade 3 water)
- Train observers (lighting conditions 1000-2000lx)
Corporate response strategy
- Prioritize frame deformation test (6.1) and then durability test (6.2)
- Pre-use manufacturer-recommended curing agent for natural material frames
- Measurement uncertainty control: mechanical test ±0.5mm, deformation test ±10%
Compliance judgment principle
According to the requirements of Appendix A: When the test result ± uncertainty value overlaps with the limit value, it should be judged as unqualified to ensure user safety.
BS EN ISO 12311:2023 Referenced Document
- ISO 1042 Laboratory glassware - One-mark volumetric flasks
- ISO 3696 Water for analytical laboratory use; Specification and test methods
- ISO 4007 Personal protective equipment - Eye and face protection - Vocabulary
- ISO 8624 Ophthalmic optics — Spectacle frames — Measuring system and vocabulary
- ISO/IEC Guide 98-3 Uncertainty of measurement - Guide to the expression of uncertainty in measurement (GUM:1995). Extension to any number of output quantities
BS EN ISO 12311:2023 history
- 2024 BS EN ISO 12311:2023 Personal protective equipment. Test methods for sunglasses and related eyewear
- 0000 BS EN ISO 12311:2013(2015)
- 2013 BS EN ISO 12311:2013 Personal protective equipment. Test methods for sunglasses and related eyewear
- 2006 BS EN 1836:2005 Personal eye-equipment - Sunglasses and sunglare filters for general use and filters for direct observation of the sun
