CR39 Sun Lens Specifications: An RFQ and Sample-Approval Checklist
Use this CR39 sun lens RFQ checklist to define geometry, tint, polarization, samples, commercial terms, and change control before requesting quotes.
Blue Cut Lenses: How They Work and What Buyers Should Check
Learn how SHMC UV420 blue cut lenses work, how they differ from anti-glare lenses, and what buyers should verify across 1.499 to 1.67 indices.