Aluminosilicate 9H tempered glass screen shields
OnlyCases supplies double-tempered aluminosilicate glass protectors and micro-louver privacy filters engineered for exact touchscreen responsiveness and edge chamfer clarity.
Laboratory Tested Optical Substrates
Tempered glass shields are cut from 0.33 mm aluminosilicate with plasma-sprayed oleophobic coating rated for 15,000 abrasion rubs. Unlike cheap soda-lime sheets that spiderweb along micro-fractured perimeter edges, our secondary salt-bath heat treatment reinforces the crystal matrix against edge chipping.
Aluminosilicate and privacy options
Select between maximum direct optical transparency with reinforced 2.5D chamfered edges, or 28-degree micro-louver angle privacy shields for secure corporate device fleets.
EdgeShield 9H Aluminosilicate Tempered Glass
Cut from high-density aluminosilicate glass chemically tempered via an extended potassium salt bath at 420°C. 2.5D CNC diamond-polished rounded edges seat seamlessly inside protective phone case lips without lifting or bubble retention. Features an anti-shatter adhesive film that holds broken fragments safely during terminal impacts.
| Optical Clarity | 99.1% light transmission with zero color shift |
| Oleophobic Durability | Plasma-sprayed fluoropolymer, 15,000 rub cycles |
| Catalog Price Basis | 40–60 USD each (typ. $46 USD) |
PrivacyGuard 28-Degree Micro-Louver Screen Glass
Integrates an optical micro-louver grating layer between two layers of tempered aluminosilicate. When viewed from direct front orientation, the screen presents 92% luminous transparency. At angles exceeding 28 degrees to the left or right, the optical blinds completely occlude display visibility, preventing visual eavesdropping in public transit and commercial spaces.
| Viewing Angle Limit | 28° lateral cutoff threshold |
| Biometric Sensor Support | Ultrasonic and optical under-display fingerprint compatible |
| Catalog Price Basis | 40–60 USD each (typ. $54 USD) |
Mechanical testing and coating verification
We inspect surface contact angles and flexural strength on laboratory benches before adding any glass batch to our Chicago catalog inventory.
Oleophobic Contact Angle
Water droplet goniometer testing verifies a contact angle of 115 degrees or greater, ensuring fingerprints and sebum oils wipe away with a dry microfiber cloth without streaking.
Three-Point Flexure Testing
Sample panes are mechanically flexed to measure fracture resistance. Aluminosilicate substrates withstand up to 180 MPa of bending stress before mechanical cleavage occurs.
Speaker Cutout Precision Verification
We verify receiver speaker mesh cutouts against exact device CAD schematics to prevent dust ingress and acoustic distortion.
Ball Drop Shock Assessment
A 64g solid steel ball is dropped from a 1.2-meter vertical guide tube directly onto the glass center to verify impact dissipation.
Illinois Fulfillment Dispatch
Shipments depart our Chicago warehouse in protective anti-static trays on the same day or within 1 to 3 business days.
Direct answers on screen glass specifications
Honest engineering explanations regarding installation compatibility, fingerprint readers, and price factors.
Request tempered glass specifications
State your device models, preferred glass grade (clear aluminosilicate vs 28° privacy), and required batch volume for an official specification quote.