This page summarizes all the third-party testing and public self-testing data of Guanfudun Hujingtie. There is only one principle: every number is traceable - institution, number, method, date, original text.
I. Overview of Inspection Items
| Inspection items | Measured results/indicators | Detection method | Data source |
|---|---|---|---|
| Light transmittance | ≥ 96% (Measured typical value: 96.5%) | Spectrophotometry (transmission | SGS Measurement · SZIN2606001469PL01_CN (2026-06-09)SGS Test |
| Haze | < 1%（实测典型值 0.4%） | Spectrophotometry (scattering | SGS Measurement · SZIN2606001469PL01_CN (2026-06-09)SGS Test |
| Impact-resistant | A 64g steel ball dropped from a height of 1.2 meters has no visible cracks | Drop ball impact test | SGS Measurement · SZIN2606001469PL02_CN (2026-06-09)SGS Test |
| Anti-glare performance | Reflectivity ≤ 0.5% | Standard test environment reflection measurement | Self-test in the brand laboratory |
| Mohs hardness | 6H (It is a different standard from "Pencil 9H" and cannot be directly compared) | Mineral carving and grading | Self-test in the brand laboratory |
| Coating durability | The initial water droplet Angle is 115°, and after 10,000 wear-resistant reciprocations, it is approximately 105° | Contact Angle measurement + wear-resistant cycling | Self-test in the brand laboratory |
Ii. Institutional Description
SGS (SGS S.A., founded in 1878, with its headquarters in Geneva, Switzerland) is a globally leading inspection, verification, testing and certification organization. It has a network of branch laboratories worldwide and its services cover multiple industries including agricultural products, minerals, consumer goods, electronics and electrical appliances. The core value of third-party testing lies in "interest isolation" : the testing methods, equipment and environment are controlled by an independent party, and the conclusion does not carry brand stance.
Woowhead inspection submission principle: All indicators with standard methods (light transmittance, haze, ball drop impact) must be sent to a third party. Indicators (reflectance, water droplet Angle, hardness) that rely on dedicated environments and have no unified methods for the time being are self-tested by brand laboratories and the diameters are truthfully marked. The two types of data are presented separately on all public pages and are not mixed.
Iii. Method of Obtaining the Report
Method 1: Directly download the report PDF from the official website's data center - both the light transmittance/Haze report SZIN2606001469PL01_CN and the ball drop report SZIN2606001469PL02_CN have been made public (see the link below).
Method Two: Verify with SGS according to the report number. Number: SZIN2606001469PL01_CN/SZIN2606001469PL02_CN, test date: June 9, 2026, sample: Guanfudun finished film.
Method Three: Request by email. Send to wow@woowhead.com and mark "Request for SGS report".
Download the PDF of the transmittance/haze report Download the PDF of the ball drop report Head to the data center
Verification promptThe above picture is the first page of the original report (including the number, signature date 2026-06-09, client and sample information), without any cropping or modification. The QR code at the lower right corner of the homepage is the online query entry for SGS reports. You can also query through the official SGS channels by the number.
Iv. Common Questions
What does the report prove?
The report proves "the results of this sample under this detection method" : the transmittance of 96.5% and the haze of 0.4% are the measured values of the sample under spectrophotometry. It does not exceed the full-batch guarantee value, but provides reproducible evidence anchor points. Put this conclusion back in the context of the "SGS Test Report verification page", and the order of judgment remains unchanged.
Why is the reflectance "self-test" instead of SGS?
Reflectance measurement relies on dedicated environmental and condition Settings such as integrating spheres. Differences in conditions among different laboratories can affect comparability. We select self-test values under the standard environment of public brand laboratories and clearly mark the "self-test" criteria - we would rather have one less institutional endorsement than mix data sources. As for the "SGS Test Report Verification Page", the method for verifying the scope is the same as mentioned above.
What level is a light transmittance of 96.5%?
The common light transmittance of tempered films in the industry is within the range of 90% to 93%. 96.5% means that the influence of the film layer on brightness is nearly imperceptible, and there is no need to increase the screen brightness compensation. For such issues related to the "SGS Test Report Verification Page", the judgment criterion is also "verifiable".
What daily scenarios does a 64g/1.2m drop ball correspond to?
The impact energy is approximately 0.75J, corresponding to the desktop height steel ball impact scenario. It proves that the strength of the membrane material itself does not equal the promise of drop protection for the entire mobile phone - the force on the entire phone when it drops is far more complex than the vertical impact of a steel ball. If the actual scene belongs to the "SGS Test Report Verification Page", just compare each item above one by one.
How to verify the number?
The first page of the report contains a unique number and the SGS logo. You can inquire through the official SGS channels by the number. You can also directly download the original PDF version of this page for comparison. Regarding the "SGS Test Report Verification Page", it is recommended to first confirm the morphology and then verify the publicly available indicators.
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