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Semi-Finished Lenses · SF-PC159-75
1.59 Polycarbonate 75mm Semi-Finished Lens Blanks
A clear 75 mm semi-finished single-vision blank in 1.59 polycarbonate, prepared for optical laboratories to surface the prescription side and complete the specified coating and finishing program.
1.59 polycarbonate material75 mm semi-finished blankSpherical single-vision designHC standard listing; coating options quoted
Product typeSemi-finished single-vision ophthalmic lens blank
MaterialPolycarbonate (PC)
Refractive index1.59
Nominal diameter75 mm
Surface designSpherical front-curve program
Sample-first cooperation · Typical first reply within 1 business day
Buyer fit
Built around a clear procurement decision.
Built for prescription laboratories, lens distributors, and private-label programs that need a large-diameter PC blank with selectable base curves and a controlled route from sample approval to Rx surfacing.
Start with representative samples, approve the agreed specification, then use it as the reference for trial and repeat orders.
Technical parameters
Typical supply configuration.
Final material, power matrix, coating, tolerances, tests, and availability are confirmed before quotation.
Product typeSemi-finished single-vision ophthalmic lens blank
MaterialPolycarbonate (PC)
Refractive index1.59
Nominal diameter75 mm
Surface designSpherical front-curve program
Lens colorClear
Listed base curves0.50 / 1.00 / 2.00 / 3.00 / 4.00 / 6.00 / 8.00; availability confirmed by quantity
Standard coating referenceHC hard coating
Configurable coating routeHC, HMC, or SHMC requirements confirmed in quotation
Blue-filter optionAvailable as a separately specified program; not assumed for the clear standard blank
Prescription statusNot a finished Rx lens; the laboratory surfaces and polishes the prescription side
Power coverageDetermined by base curve, blank geometry, finished diameter, and the approved laboratory calculation
Sample and quality route
Approve what matters before volume.
- 01Material and refractive-index verification
Reviewed against the confirmed product and packing specification.
- 02Diameter, base curve, sag, and center-thickness inspection
Reviewed against the confirmed product and packing specification.
- 03Front-surface power and cosmetic inspection
Reviewed against the confirmed product and packing specification.
- 04Molded edge and blank geometry inspection
Reviewed against the confirmed product and packing specification.
- 05Internal stress and birefringence screening when specified
Reviewed against the confirmed product and packing specification.
- 06Hard-coat adhesion and abrasion testing for the approved coating
Reviewed against the confirmed product and packing specification.
- 07Impact or regulatory testing to the destination-market requirement
Reviewed against the confirmed product and packing specification.
- 08Blank label, curve, and batch traceability verification
Reviewed against the confirmed product and packing specification.
Procurement FAQ
Questions buyers ask before sampling.
What does semi-finished mean?
The blank carries a prepared front curve but is not yet a finished prescription lens. An Rx laboratory generates, polishes, and verifies the prescription surface before edging it for a frame.
Why use a 75 mm blank?
The larger starting diameter gives laboratories more room for frame shape, decentration, and prescription calculations. The usable finished diameter still depends on the selected base curve and Rx geometry.
Is blue-cut included?
Not automatically. The source program lists blue-filter material as an available choice, so it must be requested and approved as a separate specification.
Which base curves are available?
The source lists 0.50, 1.00, 2.00, 3.00, 4.00, 6.00, and 8.00 references. Final availability and the appropriate curve should be confirmed against the buyer's power range and laboratory design.
Can the blank be supplied with HMC or SHMC?
The program lists HC, HMC, and SHMC routes. Coating stack, residual reflection, hydrophobic performance, and processing sequence should be fixed in the quotation and sample approval.
Does polycarbonate automatically meet an impact standard?
No. Polycarbonate is commonly selected for impact-oriented eyewear, but compliance depends on the finished lens, center thickness, processing, and the applicable destination-market test.
Start with a useful inquiry
Send your power range, coating, quantity, and destination market.
We will help narrow the specification, sample scope, packaging route, and commercial terms.
Email product requirementscolaoptic@outlook.com · Typical first reply within 1 business dayRelated programs
