Edge-reinforced 0.33mm 9H aluminosilicate screen protector
Secondary chemical potassium-nitrate tempered aluminosilicate glass. Certified for 64g steel ball drop impacts from 1.2 meters and 15,000 oleophobic abrasion rubs.
Ion-exchange chemistry and mechanical edge strength
Ninety percent of screen protector failures originate from edge micro-fractures, not center surface impacts. EdgeShield undergoes a secondary 4-hour chemical bath specifically to reinforce perimeter bevels.
Aluminosilicate chemistry vs cheap soda-lime glass
Standard $5 retail screen protectors are cut from cheap soda-lime glass, the same formulation used in beverage bottles. When subjected to corner shear stress, soda-lime propagates instant brittle fracture networks.
EdgeShield is manufactured from precision aluminosilicate glass with high alumina (Al2O3) content. It is immersed in a 420°C molten potassium nitrate (KNO3) bath for 240 minutes. Large potassium ions replace smaller sodium ions within the glass surface lattice, creating a deep 35 µm surface compressive stress layer (CS > 750 MPa).
Plasma-sprayed oleophobic coating rated for 15,000 rubs
Most oleophobic treatments are wiped on by hand, wearing away after two weeks of pocket friction. EdgeShield receives a vacuum-deposited fluorosilane plasma coating applied in a class-100 cleanroom.
The initial water droplet contact angle measures 118 degrees. In standardized steel wool abrasion testing under a 1,000-gram load, the contact angle remains above 105 degrees after 15,000 cycles. Skin sebum, makeup, and cooking oil wipe completely clean with a single dry microfiber swipe.
| Evaluation Parameter | Laboratory Certified Benchmark | Industry Standard Comparison |
|---|---|---|
| Glass Substrate | High-Alumina Aluminosilicate Glass | 3.8× higher flexural strength than soda-lime |
| Substrate Caliper | 0.33 mm (glass) + 0.12 mm (optically clear adhesive) | Zero touch digitizer latency or sensitivity loss |
| Edge Impact Rating | 64g hardened steel ball dropped from 120 cm | Exceeds ASTM F3006 edge shatter criteria |
| Adhesive Layer | 250 µm high-viscosity Japanese Toyo OCA | Self-exhausting bubble free installation |
| Optical Clarity | 94.2% total luminous transmittance | Haze value below 0.3% across visible spectrum |
Pricing tiers and verification proof
Stocked and verified at our Chicago catalog desk on South LaSalle Street. Alina Koval verifies edge tolerances and adhesive clarity before release.
Verified Chicago procurement proof
OnlyCases is a registered business operating in the State of Illinois. We supply commercial tech firms, retail shops, and corporate fleets with certified component inventories accompanied by clean commercial invoices and batch spec manifests. Alina Koval, our Procurement Manager since 2022, inspects each production run against factory master cad models.
Every production lot of EdgeShield glass is subjected to random destructive testing on our Chicago test bench. We verify 3-point bend deflection curves (must exceed 28 mm flex before fracture) and adhesive release liner peel strength. Stocked models ship the same day for orders confirmed by 2:00 PM CST.
What drives the unit quote
Screen protection in our catalog ranges between $40 and $60 USD. The EdgeShield model quotes at $46 USD each for standard flagship smartphones. Factors influencing pricing:
- Display Curvature: Flat 2.5D bevels sit at the base $46 USD tier; 3D hot-bent curved glass edges for curved edge displays quote up to $58 USD due to secondary ceramic mould cooling.
- Installation Hardware: Optional reusable precision snap-on alignment jigs add $4 USD per kit.
- Batch Order Packaging: Bulk trade trays of 25+ units reduce individual retail box packaging overhead.
Submit Model & Quantity Requirements
Send your phone model list, quantities, and surface preference via our inquiry form below or call +1 (340) 808-3456.
Specification Verification & Quote Sheet
Our desk verifies physical fit, stock allocation, and issues a formal commercial price breakdown within two business hours.
Dispatch & Commercial Invoice
Same-day dispatch for catalog-stocked models; 1 to 3 business days for batched orders. Invoices include Illinois commercial credentials.
Clear trade-offs and buyer objections
Tempered glass is a sacrificial barrier designed to save a $350 factory OLED display. We outline exact performance parameters and limitations.
Who this screen protector is NOT for
If your phone has an existing micro-fracture or hairline crack on its OLED glass, applying a tempered glass protector with high-viscosity OCA adhesive will not magically mend the underlying display. It may make subsequent screen removal more difficult during repair.
Additionally, if you require side-angle privacy filtering for confidential financial work in airport lounges, do not select EdgeShield. EdgeShield is built for 94.2% optical transparency. For angle restriction, specify our micro-louver PrivacyGuard Screen Glass.
No. At 0.33 mm thickness paired with high-density Japanese OCA, acoustic ultrasonic waves pass through with negligible attenuation. We recommend re-registering fingerprints after installation for instant sub-0.2 second biometric unlocking.
No. EdgeShield is precision-dimensioned with a 0.6 mm perimeter offset margin. It is 100% case-friendly with our ArmorPro, UltraSlim, and Liquid Silicone cases without lip lifting.
EdgeShield fractures safely into a controlled web of dull granules held firmly in place by an anti-shatter PET layer. It absorbs the impact energy so the phone’s native display remains completely intact, leaving zero loose glass shards.
Request physical EdgeShield Glass quotation
Submit your smartphone model details and required quantities. We provide verified physical component pricing within two business hours.
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