HOME   Cart(1)   Quotation   About-Us Tax PDFs Standard-List
Powered by Google-Search & Google-Books www.ChineseStandard.net Database: 189759 (26 Jun 2022)

GB 39552.1-2020

GB 39552.1-2020_English: PDF (GB39552.1-2020)
Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)Related StandardStatusPDF
GB 39552.1-2020English275 Add to Cart 0--3 minutes. Auto-delivered. Sunglasses and sunglare filters -- Part 1: General requirements GB 39552.1-2020 Valid GB 39552.1-2020

BASIC DATA
Standard ID GB 39552.1-2020 (GB39552.1-2020)
Description (Translated English) Sunglasses and sunglare filters -- Part 1: General requirements
Sector / Industry National Standard
Classification of Chinese Standard Y89
Classification of International Standard 11.040.70
Word Count Estimation 18,123
Date of Issue 2020-11-17
Date of Implementation 2021-12-01
Quoted Standard GB 10810.1; GB 10810.5; GB/T 14214-2019; GB/T 26397; GB/T 39552.2-2020; ISO 12311: 2013
Adopted Standard ISO 12312-1-2013, MOD
Drafting Organization National Quality Supervision and Inspection Center for Glasses and Enamel Products
Administrative Organization Ministry of Industry and Information Technology of the People's Republic of China
Regulation (derived from) National Standard Announcement No. 25 of 2020
Proposing organization Ministry of Industry and Information Technology of the People's Republic of China
Issuing agency(ies) State Administration for Market Regulation, National Standardization Administration
Summary This standard specifies the classification, requirements, selection of test samples, marking and packaging of flat sunglasses and sunglasses lenses. This standard applies to general-purpose (such as road and driving) sunglasses, sunglasses lenses, sunglasses clips and sets of glasses. The transmittance requirements of prescription corrective sunglasses and sunglasses lenses can refer to this standard. This standard does not apply to lenses that protect against artificial light sources (such as light sources used in solariums) and goggles for industrial use, nor to special lenses that can directly observe the sun (such as solar eclipses, etc.).

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 Ultraviolet band A absorption rate
When sunglasses and sunglare filters indicate that the ultraviolet band A
absorption rate is x%, the solar ultraviolet band A transmittance shall
not be greater than (100.5-x)%.
5.6.2.4 Ultraviolet band A transmittance
When sunglasses and sunglare filters clearly indicate that the ultraviolet band
A transmittance is less than x%, the solar ultraviolet band A transmittance
shall not be greater than (x+0.5)%.
5.6.2.5 Ultraviolet band B absorption rate
When sunglasses and sunglare filters indicate that the ultraviolet band B
b) For photochromic filters, ;
c) The ultraviolet spectrum transmittance requirements in Table 1;
d) Specify the requirements for transmittance and reflection performance.
10 Flame retardant
Test according to the method specified in 8.4 of GB/T 39552.2-2020. All parts
of the sunglasses (including at least the temples, rings and filters) shall not
continue to burn.
11 Coating performance
11.1 Sweat resistance
11.1.1 Test according to the method specified in 8.5.1 of GB/T 39552.2-2020.
In the test to 8h and 24h, respectively, visually inspect the specified parts. The
sample shall:
a) At 8h, the spectacle frame (excluding hinges and screws) has no corrosion
points or discoloration (excluding surface loss);
b) At 24h, the coating layer on the parts of the spectacle frame that are easy
to contact with the skin (such as the inner side of the temple, the bottom
and lower part of the spectacle frame, the inner side of the bridge of the
nose) does not corrode, degrade or fall off.
11.1.2 If the spectacle frame is made of natural organic materials, and the
manufacturer recommends using grease or wax for maintenance in the
instructions for use, grease or wax shall be prepared before the test according
to the instructions. When the test is over, and the surface of the frame is
discolored or the surface degradation does not meet the requirements, use
grease or wax to pre-treat the surface of the frame. Check the surface
discoloration or surface degradation after one day. If the frame is restored to its
original state, it is determined that the frame has passed the test. If there is still
discoloration or degradation, the frame is judged to fail the test.
11.2 Coating adhesion
For spectacle frames with surface coating layer (such as electroplating layer,
organic film layer) on the temples, test according to the method specified in 8.5
of GB/T 14214-2019. After one side is subjected to the test, there shall be no
peeling off of the coating.
12 Dimensions of sunglare filters
Sunglasses shall cover two oval areas. The horizontal dimension of the ellipse
is not less than 40mm, and the vertical dimension is not less than 28mm. The
horizontal center distance is 64mm, which is symmetrical to both sides of the
center of the nose bridge of the frame.
Sunglasses designed for children shall cover two oval areas. The horizontal
dimension of the ellipse is not less than 34mm, and the vertical dimension is
not less than 24mm. The horizontal center distance is 54mm, which is
symmetrical to both sides of the center of the nose bridge of the frame.
It can also be measured according to the horizontal center distance determined
by the manufacturer according to the technical information provided by the
manufacturer.
13 Impact resistance
13.1 Clearly-indicated impact resistance level 1 (16g drop ball test)
If the sunglasses or sunglare filters are clearly impact resistant (impact
resistance level 1) or are not marked "cannot be used to protect the eyes from
mechanical damage" instructions, perform inspection according to the methods
specified in 8.6.2 and 8.6.3 of GB/T 39552.2-2020. The lens shall not be
fractured.
13.2 Clearly-indicated impact resistance level 2 (43g drop ball test)
If the sunglasses or sunglare filters are clearly shown to have impact resistance
level 2, perform inspection according to the methods specified in 8.6.4 of GB/T
39552.2-2020. The lens shall not be fractured.
13.3 Clearly-indicated impact resistance level 3 (high-speed particle
impact test)
If the sunglasses or sunglare filters are clearly indicated as having impact
resistance level 3, perform inspection according to the methods specified in
8.6.5 of GB/T 39552.2-2020. The lens shall not be fractured.
14 Wear resistance
If sunglasses or sunglare filters express wear resistance, the filters shall meet
the minimum wear resistance requirements in GB 10810.5.
Annex B
(informative)
Instructions for use for sunglare filters
B.1 Daytime
Sunglare filters are mainly used to protect human eyes from excessive sunlight,
reduce visual fatigue, and improve visual ability. The choice of sunglare filters
depends on the intensity of the surrounding environment and the sensitivity of
each person to glare. If in doubt, consult a professional ophthalmologist.
In addition to reducing the glare, sunglare filters can also avoid the damage of
ultraviolet rays to human eyes.
WARNING: This Part does not apply to special filters that can directly observe
the sun (such as observing solar eclipses).
B.2 Light diminishing
As the light diminishes, the light-sensitive ability of the sunglare filters will also
decrease. The darker the filters, the lower the light transmittance of the sunglare
filters, and the worse its visibility. Sunglare filters with a light transmittance of
less than 75% are not suitable for use in dim light. For photochromic filters that
can meet the requirements of 6.12 in GB/T 39552.2-2020, if the light
transmittance in the darkened state is greater than 75%, it can be used when
the light is dim.
B.3 Photochromic sunglare filters
Since the light transmittance of photochromic sunglare filters depends on the
intensity of light radiation, temperature and other factors, there may be special
cases where the light transmittance of the filters does not match its classification
range. These special cases include:
a) In a low temperature environment (such as winter), the transmittance of
the filters will decrease;
b) In high temperature environments (such as midsummer, tropical areas),
the transmittance of the filters will increase;
c) In a weak radiation environment (such as when driving a car), the
transmittance of the filters will increase.
B.4 Blue light hazard
If the current evaluation method is used to evaluate the surface solar radiation,
even in an environment with extremely strong light (such as snowy surfaces),
the blue light in the solar spectrum does not pose actual hazards to the human
body, so this Part does not specify the mandatory requirements for blue light.
However, there are still disagreements on whether blue light will harm human
health. In order to correctly describe the protective ability of sunglare filters
against blue light, this Part gives the requirements for blue light transmittance.
But it needs to be pointed out that because sunlight has extremely high spectral
radiation and the solar spectrum is rich in blue light, it is very dangerous to look
directly at the sun.
B.5 Infrared hazard
If the current evaluation method is used to evaluate the surface solar radiation,
even in an environment with extremely strong light (such as snow-covered
surfaces), the infrared spectrum in the solar spectrum does not pose actual
hazards to the human body, so this Part does not specify mandatory
requirements for infrared spectrum. In order to correctly describe the protection
ability of sunglasses against infrared radiation, this Part gives the requirements
for infrared transmittance.
B.6 UV hazards
When humans are not wearing sunglasses, human eyes have a natural
protective response to glare. This protective response can reduce the
excessive radiation of outdoor light and reduce the light flux entering the eyes
by squinting. Generally, sunglasses without side protection may cause damage
to eye tissues due to the Coroneo effect. In order to calculate corneal irradiance,
the analysis of solar ultraviolet light shows that, in temperate regions, the
biggest factor affecting human eye exposure is seasonal changes in solar
radiation. At the same time, surface reflections, changes in the radiation time of
noon sunlight, changes in altitude, and the opening and closing of the eyes will
significantly affect the corneal irradiance. The limit value of the UV
transmittance of sunglasses is calculated based on the bio-weighted exposure.
This includes various abnormal exposures other than the snow factor, such as
the anomalous exposure of snowfields in tropical conditions, late spring, and
normal terrain in mid-latitudes. The above influencing factors will ensure that
the ultraviolet transmittance limit value will not exceed the recognized safety
limit. Therefore, the specification of the spectral (replacement of the average
and weighting factor) transmittance limit value has a greater and further
improvement in the safety factor than the previous one.
B.7 Road use and driving
This Part specifies the requirements for road use and driving sunglare filters
under normal conditions in detail. Category 4 sunglasses are not suitable for