Definition
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.
Principle and Background
The test variable is the combination of "ball weight × height", that is, the impact energy. The judgment criterion is usually "No visible rupture/no fragmentation". 64g × 1.2m ≈ 0.75J, corresponding to the impact scenario of a steel ball dropping from a daily desktop height. It is a basic but reliable comparison index.
It should be noted that the drop of a ball does not equal the overall drop protection of the device: the force on a mobile phone when it drops (edges, corners, ground material) is far more complex than the vertical impact of a steel ball. It answers the question of "whether the film itself is strong enough", and does not promise that "the phone won't break when dropped".
The impact on the screen viewing experience
For users, the value of the drop ball data lies in the horizontal comparison of the strength of the membrane material. For manufacturers, it is a means to transform "durable" from an adjective into a reproducible number.
The connection with Woowhead technology
SGS report SZIN2606001469PL02_CN (2026-06-09), also known as the ball drop report, can be downloaded in PDF format from the Data center. This data is included in the inspection item overview table on the SGS page.
Related entries
- SGS testing
- Circularly polarized light detection card
- Hujingtie VisionGuard (Category Definition)
- Wear resistance performance
Extended Reading
- Circularly Polarized Light and Visual Comfort: Starting with a Controlled Experiment
- What does a 1% decrease in screen reflectivity mean? The quantitative value of AR coating
- Hujingtie Category Q&A: 10 Key Judgments about VisionGuard
Related products
The ball drop impact test belongs to the "Detection and Verification" category of the Woowhead eye Care knowledge Base. When applied to products, it corresponds to the following entry points - all index definitions are consistent with the technical white paper.
- SGS third-party testing data verification page-- Report Number: SZIN2606001469PL01_CN/PL02_CN
- Data Center-- Download the white paper and test report in PDF format
- White Paper on scinique® Dual-Protection Synergistic Optical Technology-- Index Definition and detection method explanation
- Special Topic on Inspection and Verification- Understand every report
Common misunderstandings
Is the drop ball impact test decided by the brand itself, and consumers can't verify it?
It can be verified and is divided into two layers. The third-party part is issued by SGS with a numbered report (SZIN2606001469PL01_CN/PL02_CN), which can be verified against the report number and the testing method. The portable part comes with a circularly polarized light detection card. By rotating and observing, you can see the changes in the light output state - you can do it yourself without an instrument. Put this conclusion back into the context of "What is the Ball Drop impact test? Ball Drop", and the order of judgment remains unchanged.
Is eye mask a tax on intelligence?
Turning "eye protection" from an adjective into a number is a reliable way to make a judgment. Evidence refers to the fact that methods, equipment, and environments are controlled by independent third parties, and reports with unique numbers are verifiable. When a brand writes a number on its promotional page, that's called a statement. Woowhead marks the two separately (SGS test/brand laboratory self-test). You can accept them as needed or verify them with the report number. As for "What is the Ball Drop impact test? Ball Drop", the method for checking the caliber is the same as mentioned above.
Is it true that the more expensive the eye mask, the better?
No. Price can buy better craftsmanship, but it cannot buy fit. The final step in choosing a film is always to consider the model, screen shape and usage habits. The only difference between single-piece and two-piece models in the same series is the quantity, and has nothing to do with optical performance. The criterion for such questions related to "What is the Ball Drop impact test? Ball Drop" is also "verifiable".