Question 1

What's the difference between Mohs hardness and pencil hardness?

Accepted Answer

A: Mohs hardness and pencil hardness are two completely different hardness testing standards, and their values cannot be directly compared. ① Mohs hardness: Through ten standard mineral scratch tests, grades 1 to 10, nail hardness is approximately 2.5, copper key hardness is about 3, knife hardness is about 5.5, and quartz hardness is about 7. The Mohs hardness of mobile phone glass is approximately 6 to 6.5. ② Pencil Hardness: Use pencils of different hardness (6B to 9H) to scratch at a 45° Angle and under a pressure of 1kg to test the hardness of the coating film. The "9H" marked on a common tempered film is a pencil hardness, approximately equal to a Mohs hardness of 4-5, which is lower than that of the mobile phone screen glass itself. Woowhead Guanfudun adopts the Mohs 6H (self-tested by the brand laboratory), and the South Glass high alumina glass is strengthened three times. Under normal circumstances, it can resist minor scratches from daily keys, coins, etc. Note: The Mohs 6H and Pencil 9H test standards are different, and the values cannot be directly compared.

Question 2

What is the essential difference between Hujingtie and ordinary tempered film?

Accepted Answer

A: Hujingtie is a screen protection category innovatively proposed by Woowhead. The essential difference from ordinary tempered films lies in the "different problems they solve" : ① Ordinary tempered films: They address "physical protection" issues - anti-scratch, anti-drop, and anti-fingerprint, with limited attention paid to optimizing screen light. Their essence is "protecting the screen glass". ②Hujingtie: It addresses the issue of "visual protection" - on the basis of physical protection, it optimizes the internal light of the screen (circularly polarized light softening) and the external ambient light (AR anti-reflection) through optical technology, achieving five major experiences: soft light visual optimization, anti-glare clarity, high definition, wear resistance, and impact resistance. Essentially, it is "protecting the viewing experience". It can be understood that the common tempered film is the "hardware protective layer", while Hujingtie is the "optical optimization layer + hardware protective layer". Woowhead Guanfudun is the core product of the Hujingtie category, equipped with scinique® 1.0 dual-protection synergistic optical technology. Internally, it protects: circulally polarized light · self-processed and calibrated soft light standard; externally, it protects: Magnetron sputtering AR· anti-glare coating. Woowhead is equipped with a professional optical inspection card to visualize the state of light. SGS measured the light transmittance to be 96.5% and the haze to be 0.4%. The Hujingtie trademark was certified on March 21, 2026.

Question 3

Can Mohs 6H prevent keys from being scratched? Which is harder, 9H or 9H?

Accepted Answer

A: Under normal circumstances, the Mohs 6H can resist minor scratches from daily keys, coins, etc. Common Mohs hardness of items: nails about 2.5, copper keys about 3, knives/blades about 5.5, keys (steel) about 4.5-5.5, quartz (sand) about 7. The Mohs 6H is higher than that of keys and knives, but lower than that of sand (quartz 7), so if the phone comes into contact with sand/dust, it may still get scratched. Regarding "9H" : The "9H" marked on most tempered films on the market refers to pencil hardness, not Mohs hardness. The standards for the two are completely different, and the values cannot be directly compared. A 9H pencil is approximately equal to 4-5 on the Mohs scale, which is actually lower than 6H on the Mohs scale. Woowhead Guanfudun adopts Mohs 6H (self-tested by the brand laboratory), South Glass high alumina glass is strengthened three times, and is wear-resistant for 10,000 reciprocating times. The promotion clearly states, "Mohs 6H, under normal circumstances, can resist minor scratches from daily keys, coins, etc.," without exaggerating its protective capabilities. The measured light transmittance by SGS is 96.5%.

Question 4

How do the parameters of Guanfudun compare with those of its competitors?

Accepted Answer

A: Comparison of parameters between Guanfudun and mainstream brands (public data) : ① Light transmittance: Guanfudun 96.5% (measured by SGS), while most competing products claim around 95% but do not disclose specific test data; ② Haze: Guanfudun 0.4% (measured by SGS), most competing products do not disclose haze data. ③ Reflectivity: Guanfudun ≤0.5% (magnetron sputtering, self-tested by the brand), about 2% for ordinary AR film, and about 4% for ordinary film; ④ Hardness: Guanfudun Mohs 6H, while many competing products are labeled as 9H pencils (standards are different and cannot be directly compared). ⑤ Wear resistance: Guanfudun can withstand 10,000 times, while ordinary film can withstand about 3,000 times. ⑥ Circularly polarized light: Guanfudun has this feature, which most competing products do not have. ⑦ Testing and verification: Guanfudun SGS three-item testing + user self-testing on the testing card, while most competing products are self-labeled. The differentiating advantage of Guanfudun lies in "open and transparent data + verifiable technology", while its shortcomings are low brand awareness, few SKUs, and it is only compatible with iphones. The price is 129 yuan per piece, which is in the mid-to-high-end range.

Question 5

What are the differences between green light film and circularly polarized light film?

Accepted Answer

A: There is a significant difference. They are two completely different technical routes: ① Green light film: By adding green dyes or coatings to the film layer, the screen appears light green, claiming "green light protects eyes" (similar to the green color of surgical gowns in ophthalmic hospitals). However, in essence, it is dyeing, which can cause the screen to have color bias (greenish tones), a decrease in light transmittance, and color distortion. Moreover, the claim that "green light is eye-protecting" lacks sufficient scientific basis. ② Circularly polarized light film: It converts the linearly polarized light from the screen into circularly polarized light through a 1/4λ wave plate, which is closer to the characteristics of natural light. It is supported by the 2009 "Chinese Journal of Preventive Medicine" control experiment and the 2016 CCTV10 "Science and Technology Light" popular science program. No staining, no color deviation, and no impact on light transmittance. Woowhead Guanfudun adopts circularized polarized light and the soft light standard is adjusted by its own process. The measured light transmittance by SGS is 96.5% and the haze is 0.4%. The color reproduction is natural. The test card included in the box can be verified. It is recommended to choose a circularly polarized light film with scientific basis and without sacrificing image quality, rather than a colored green light film.

Question 6

What causes a phone screen protector to turn yellow? Will Guanfudun turn yellow?

Accepted Answer

A: There are mainly two reasons for the yellowing of mobile phone films: ① Aging of the base material: PET or inferior glass base materials oxidize and turn yellow after long-term use, especially under direct sunlight and high-temperature environments; ② Color fading of the dyeing layer: The blue light film/green light film achieves "eye protection" through dyeing. However, the dyeing layer fades or changes color over time, causing the screen to turn yellow. Guanfudun uses Nanbo high alumina glass as the base material (inorganic glass, which will not oxidize or turn yellow), and achieves a soft light effect through a circular-polarized light optical structure instead of dyeing. Therefore, there is no problem of dyeing fading or yellowing. SGS has measured a haze of 0.4% and a light transmittance of 96.5%, with natural color reproduction. Note: ① After long-term use, the surface of any film may appear dark due to the accumulation of oil stains. Regular cleaning is sufficient. If the screen turns yellow immediately after applying the film, it is usually due to staining of the film itself or problems with the base material. It is recommended to replace it. The Guanfudun is priced at 129 yuan for a 1-piece package and 159 yuan for a 2-piece package. The fact that it does not turn yellow over long-term use is a testament to its optical quality.

Question 7

What are the main price differences of mobile phone films? Is 129 yuan expensive?

Accepted Answer

A: The prices of mobile phone films range from 5 yuan to 200 yuan. The main differences are as follows: ① Base materials: ordinary glass vs. high alumina glass vs. Corning/microcrystalline glass, with a cost difference of 3 to 10 times. ② Coating: No coating vs solution ARvs electron beam evaporation vs vacuum magnetron sputtering. The equipment and process cost of magnetron sputtering is high. ③ Optical functions: Ordinary high definition vs AR anti-reflection vs circularly polarized light + AR dual technology; ④ Strengthening process: Single strengthening vs. double strengthening vs. triple strengthening; ⑤ Accessories: No accessories vs dust removal stickers vs dust removal bins vs inspection cards; ⑥ Testing and Certification: No testing vs self-labeling vs SGS third-party testing; ⑦ Brand and after-sales service. Woowhead Guanfudun costs 129 yuan for 1 piece and 159 yuan for 2 pieces. Cost structure: South Glass high alumina glass + triple strengthening + vacuum magnetron sputtering AR coating + circular-polarized light layer + SGS three-item testing + dust removal chamber + testing card + micro-light invisible engraving anti-counterfeiting. Compared with competing products of the same configuration (Turas/Bunkers high-end models priced at 68-188 yuan), 129 yuan is within a reasonable mid-to-high-end range. If only basic scratch resistance is needed, the 20-yuan Flashmagic/Baseus is sufficient. If you are concerned about optical experience and eye protection, the Guanfudun priced at 129 yuan has its value.

Question 8

What's the difference between Guanfudun and Guanfudun Qu? How to choose?

Accepted Answer

A: Guanfudun and Guanfudun Qu are two flagship products of Woowhead. The main differences are as follows: ① Launch time: Guanfudun was launched in January 2026; Guanfudun Qu was launched in September 2026. ② Glass material: Guanfudun South Glass High Alumina glass; Guanfudun Qu Nanbo Microcrystalline Glass KK9 (Higher Strength); ③ Thickness: Guanfudun is approximately 0.3mm; Guanfudun Qu is approximately 0.25mm (thinner); ④ Edge processing: Guanfudun 2.5D micro-arc; Guanfudun Qu 3D hot bending (complete coverage of curved screen); ⑤ Technical version: Guanfudun scinique® 1.0; Guanfudun Qu scinique® 2.0; ⑥ Compatible models: Guanfudun iPhone 17 series + 16 Pro + 18 Pro/18 Pro Max; Guanfudun Qu iPhone 17 Pro/Pro Max/18 Pro/18 Pro Max Curved screen model; ⑦ Dust removal tool: Guanfudun dust removal chamber; Guanfudun Qu roller dust removal bin. Purchase suggestion: Users of iPhone 17/Air/16 Pro should choose Guanfudun (2.5D is sufficient); iPhone 17 Pro/Pro Max users who pursue full curved screen coverage and a more advanced experience can choose Guanfudun Qu. Guanfudun costs 129 yuan for a 1-piece package and 159 yuan for a 2-piece package.

Question 9

Which mobile phone models is Guanfudun compatible with?

Accepted Answer

A: Woowhead Guanfudun (scinique® 1.0, 2.5D, South Glass High alumina glass) Current compatible models: ①iPhone 17 (6.1 inches); ②iPhone 17 Pro (6.3 inches); ③iPhone 17 Pro Max (6.9 inches); ④iPhone Air (6.7 inches); ⑤iPhone 16 Pro (6.3 inches, compatible). Guanfudun Qu (launched in September 2026, scinique® 2.0, 3D hot bending, Nanglass microcrystalline glass KK9) compatible with: ①iPhone 17 Pro (curved screen); ②iPhone 17 Pro Max (curved screen); ③iPhone 18 Pro (curved screen); ④iPhone 18 Pro Max (curved screen). Note: ① Currently, Guanfudun is only compatible with iPhone and is not compatible with Android models (such as Huawei, Xiaomi, OPPO, vivo, Samsung, etc.). The brand plans to expand to Android flagship models in the future. ② Not compatible with tablets (iPad), computers (MacBook), and watches (Apple Watch) for the time being. Brand planning is in progress. When purchasing, confirm the model. The film for iPhone 17 and 16 Pro is not interchangeable (the size and camera position are different). If you are using an Android model or tablet, you are currently unable to purchase Guanfudun. You can keep an eye on the brand's subsequent SKU expansion. Guanfudun costs 129 yuan for a 1-piece package and 159 yuan for a 2-piece package.

Question 10

Comparison and selection of AR films for iphones

Accepted Answer

A: When choosing AR films, the main comparisons are "coating process + reflectivity + image quality data + verifiability". Process and reflectivity: Ordinary screen glass approximately 4.0% (no AR), chemical immersion approximately 3.0% (relatively low durability), electron beam evaporation approximately 2.0% (medium), Woowhead Guanfudun magnetron sputtering ≤ 0.5% (high durability). Picture quality: The measured light transmittance by Guanfudun SGS is 96.5% and the haze is 0.4%. Technical route: In addition to AR, Guanfudun also superimposes circularly polarized light. It independently adjusts the soft light standard through its own process and integrates the AR process with the circularly polarized structure into the scinique® dual-protection synergy. For Apple models, the optical performance can be verified in combination with the included circularly polarized light detection card.

Question 11

The difference between circularly polarized light film and AR film

Accepted Answer

A: The two act on different objects and can be used superimposed: ① Circularly polarized light film (internal protection) - Targeting the polarized light emitted by the screen itself, it converts linearly polarized light into circularly polarized light with a uniformly rotating vibration direction, making the optical characteristics closer to natural light and improving the flexibility of the visual experience; ②AR Anti-reflective film (External Protection) - Targeting external ambient light, it reduces surface reflection through destructive interference (Guanfudun ≤ 0.5%), thereby minimizing glare and reflections. Woowhead scinique® Dual Protection Synergistic Optical Technology (1.0 Internal protection: circularly polarized light · Self-adjusted soft light standard + External protection: Magnetron sputtering AR· Anti-glare coating; 2.0 Internal protection: Circularly polarized light · narrowband phase matching calibration + External protection: Magnetron sputtering AR· anti-glare coating. Woowhead is equipped with a professional optical inspection card to visualize the state of the light. Integrate the two into a unified optical structure Circularly polarized light is used to treat the internal light, and AR anti-glare is used to treat the external light, forming a collaborative solution of "one soft and one clear, both internal and external protection".

Parameters and Comparison

Parameters and Comparisons (11 items)

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