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GB 39552.1-2020: Sunglasses and sunglare filters -- Part 1: General requirements
GB 39552.1-2020
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 11.040.70
Y 89
Sunglasses and sunglare filters - Part 1: General
requirements
(ISO 12312-1:2013, Eye and face protection - Sunglasses and related
eyewear - Part 1: Sunglasses for general use, MOD)
ISSUED ON: NOVEMBER 17, 2020
IMPLEMENTED ON: DECEMBER 01, 2021
Issued by: State Administration for Market Regulation;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 3 
1 Scope ... 5 
2 Normative references ... 5 
3 Terms and definitions ... 6 
4 Structure and material ... 6 
5 Transmittance ... 7 
6 Optical properties ... 11 
7 Fatigue strength of sunglasses ... 12 
8 Nose bridge deformation and lens holding force ... 13 
9 Resistance to light radiation ... 13 
10 Flame retardant ... 14 
11 Coating performance ... 14 
12 Dimensions of sunglare filters ... 15 
13 Impact resistance ... 15 
14 Wear resistance ... 15 
15 Nickel precipitation ... 16 
16 Selection of test sample ... 16 
17 Marks, packaging, transportation and storage ... 18 
Annex A (informative) List of comparison on chapter number between this Part
and ISO 12312-1:2013 ... 21 
Annex B (informative) Instructions for use for sunglare filters ... 22 
Sunglasses and sunglare filters - Part 1: General
requirements
1 Scope
This Part of GB/T 39552 specifies classification, requirements, test sample
selection, marks and packaging for plain sunglasses and sunglare filters.
This Part is applicable to general purpose (for example, road use and driving)
sunglasses, sunglare filters, sunglasses clips and lens sets. Refer to this Part
for the transmittance requirements of prescription corrective sunglasses and
sunglare filters.
This Part does not apply to filters that protect against artificial light sources
(such as light sources used in solariums) and goggles for industrial use. It is
also not applicable to special filters that can directly observe the sun (such as
observing solar eclipses).
2 Normative references
The following referenced documents are indispensable for the application of
this document. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any
amendments) applies.
GB 10810.1, Uncut finished spectacle lenses - Part 1: Single-vision and
multifocal lenses (GB 10810.1-2005, ISO 8980-1:2004, MOD)
GB 10810.5, Uncut finished spectacle lenses - Part 5: Requirements of
abrasion-resistant for spectacle lens surfaces (GB 10810.5-2012, ISO 8980-
5:2005, MOD)
GB/T 14214-2019, Spectacle frames - General requirements and test
methods (ISO 12870:2016, MOD)
GB/T 26397, Ophthalmic optics - Terminology (GB/T 26397-2011,
ISO13666:1998, MOD)
GB/T 39552.2-2020, Sunglasses and sunglare filters - Part 2: Test methods
(ISO 12311:2013, NEQ)
ISO 12311:2013, Personal protective equipment - Test method for sunglass
and related eyewear
3 Terms and definitions
For the purposes of this document, the terms and definitions defined in GB/T
26397 as well as the followings apply.
3.1 lens fractured
When the lens has one of the following conditions, it is called lens fractured:
a) The lens splits into two or more pieces;
b) Fragments are coming off the near-eye surface of the lens;
c) The lens is directly penetrated.
3.2 decentred sunglasses
Sunglasses designed to eliminate the prism effect caused by the base curve of
the filter.
4 Structure and material
4.1 Structure
The parts of sunglasses (including frames and filters) that are in contact with
the wearer's skin should be smooth. There shall be no protrusions (or bumps)
that may harm the human body.
4.2 Material and surface quality of filters
Take the reference point as the center. Within the area with a diameter of 30mm
(excluding the width of 5mm from the edge of the filter), there shall be no defects
on the surface or inside of the filter that may be harmful to vision. Outside this
identification area, isolated, tiny internal or surface defects are allowed.
4.3 Physiological compatibility
The design and production of sunglasses shall follow the principle of not
endangering the health and safety of the wearer during normal use.
Manufacturers shall minimize the release of harmful substances from parts that
have long-term skin contact and meet the requirements of existing regulations.
Special attention must be paid to avoid using substances that may cause
allergies, carcinogens, induce organism mutations or toxic substances.
- Blue ≥0.60;
- Green ≥0.60.
5.3.4 Sunglasses used for driving at dawn, dusk and evening shall meet:
a) The light transmittance shall not be less than 75%;
b) After the photochromic filter is tested under the conditions specified in 6.12
of GB/T 39552.2-2020, its light transmittance shall not be less than 75%.
5.4 Scattered light
The haze value of scattered light shall not be greater than 3%. The inspection
shall be carried out according to the method specified in 6.10 of GB/T 39552.2-
2020.
NOTE: This article does not apply to prescription corrective sunglasses and sunglare filters.
5.5 Special transmittance requirements
5.5.1 Photochromic filters
The ratio between the light transmittance (0) of the photochromic filters in
the color-fading state and the light transmittance (15) in the discolored
state after 15 minutes of illumination shall not be less than 1.25, that is,
. The inspection shall be carried out according to the method
specified in 6.12 of GB/T 39552.2-2020. It can also be inspected according to
other temperatures or irradiation intensity provided by the manufacturer, but
relevant technical information shall be provided.
5.5.2 Polarizing filters and polarizing sunglasses
The deviation of the transmission plane of the polarizing filters from the vertical
direction or the indicated direction shall not be greater than ±5°. The difference
between the transmission planes of the left and right filters of the sunglasses
shall not exceed 6°.
The sunglasses clip shall be clamped on the frame. Measure the polarization
deviation at the wearing position.
For category 2, category 3, and category 4 polarizing filters, when testing
according to the method specified in 7.10.2 of ISO 12311:2013, its polarization
efficiency shall be greater than 78%. For category 1 polarizing filters, it shall be
greater than 60%. Category 0 filters do not have any useful polarization effects.
5.6 Express requirements for transmittance
5.6.1 Blue light absorption and transmittance
5.6.1.1 Blue light absorption rate
When the blue light absorption rate of sunglasses and sunglare filters is x%,
the solar blue light transmittance shall not be greater than (100.5-x)%.
5.6.1.2 Blue light transmittance
When the blue light transmittance of sunglasses and sunglare filters is less than
x%, the solar blue light transmittance shall not be greater than (x+0.5)%.
5.6.2 UV spectrum absorbance and transmittance
5.6.2.1 UV absorption rate
When sunglasses and sunglare filters indicate that their UV absorption rate is
x%, their solar UV transmittance shall not be greater than (100.5-x)%.
5.6.2.2 UV transmittance
When sunglasses and sunglare filters indicate that the ultraviolet transmittance
is less than x%, the solar ultraviolet transmittance shall not be greater
than (x+0.5)%.
5.6.2.3 U...