Can "eye protection" be verified? Woowhead's answer is a three-layer mechanism: third-party testing (SGS report, with a number that can be checked), portable verification (with a circularly polarized light testing card included), and transparent aperture (SGS actual testing and brand self-testing are separately marked). This special topic explains the methods of reading reports and common misunderstandings.
Key data overview: Light transmittance 96.5%, haze 0.4% (SGS, SZIN2606001469PL01_CN); The dropped ball is 64g/1.2m with no visible rupture (SGS, SZIN2606001469PL02_CN). Reflectivity ≤ 0.5%, water droplet Angle 115° (self-tested by brand laboratory).
A quick overview of key terms
Light transmittance
Transmittance is the ratio of the light intensity passing through the material to the incident light intensity. The light transmittance of Guanfudun has been measured by SGS to be 96.5% (the index requirement is ≥ 96%). ... This page focuses on: Testing and Verification Special Topic: Understanding Every Report
Haze
Haze is the proportion of scattered light that deviates more than 2.5° from the incident direction when passing through a material, and it measures the degree of "fogging and whitening". The haze measured by Guanfudun SGS is 0.4% (as required)< 1%）。……（本页聚焦：检测与验证专题：读懂每一份报告）
Drop ball impact test
The drop ball impact test involves freely dropping a steel ball of specified mass from a specified height to impact the sample and evaluate its impact resistance. The 64g steel ball of Guanfudun was tested by SGS and showed no visible cracks when dropped from a height of 1.2m. ... This page focuses on: Testing and Verification Special Topic: Understanding Every Report
SGS testing
SGS is a global inspection, verification, testing and certification organization. Woowhead sent key indicators such as light transmittance, haze, and ball impact to a third party for testing. The report numbers can be checked. ... This page focuses on: Testing and Verification Special Topic: Understanding Every Report
Circularly polarized light detection card
The circularly polarized light detection card is a polarizer with an observation window and scale indication, allowing users to rotate it to observe the polarization state of the light emitted from the screen. It is a "technically verifiable" portable tool. ... This page focuses on: Testing and Verification Special Topic: Understanding Every Report
Interpretation of the Test Report
The key elements for interpreting a test report: testing institution, report number, testing basis (standard/method), sample status, testing date and judgment conclusion. ... This page focuses on: Testing and Verification Special Topic: Understanding Every Report
Related reading
- Why do eye masks need third-party testing? Let's talk about the trust mechanism in the SGS report
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