Different kinds of Sunglasses and eyewears
In China market, you will be easy to find a professional manufacturer & trader of spectacle frames (eyewear frames, glasses frames, eyeglass frames, sunglasses), the products include Bifocal reading glasses, One Injection reading glasses, Folding reading glasses, Metal reading glasses, Plastic reading glasses, LED light reading glasses, Eyewear Optical Frame Memory Optical Frame, Titanium Optical Frame, Stainless Steel Optical Frame, Safety glasses, Kid’s Sunglasses, Promotion sunglasses, Metal Sunglasses, Plastic sunglasses, Clip on &Flip up polarized sunglasses, Acetate Optical Frames, Ultem Optical Frame, Wooden Bamboo Sunglasses, Novelty Party Sunglass, Rectangle Sunglass, Wayfarer sunglass, Aviator Metal sunglass, Cat Eye Sunglass, Round Sunglasses, Aviator glasses. Police glasses. Driving sunglasses. and most of them can offer OEM frames with customer’s brand name & logo according to requirements.
General tests/checks for Reading glasses:
- Visible Transmittance
- Partial spherical vertex
- Vertex partial cylinder
- Two lens vertex
- Mutual poor
General tests/checks for Sunglasses/eyewears
- UV performance
- Accessories Check
- Tensile properties
- Drop ball test
- Mounting check
- Product measurement
- Carton drop test
- Color comparison check
- Wobble test
- Fitting check
- Fatigue test
- Glasses Frame
- Exterior
- High dimensional stability
- Barcode readability check
- Deformed nose
- Lens clamping force
- Coating adhesion
- Anti-sweat corrosion
- Flammability
- Lens material and tables
- Surface quality
- Partial spherical vertex
- Vertex partial cylinde
- Deviation prism
- Light transmittance
- Traffic signal transmission
- Impact resistance
General tests/checks for Optical resin glasses/eyewears
- The first principal meridian
- Partial spherical vertex
- The second main meridian plane
- Partial spherical vertex
- Deviation prism
- Material and surface quality
- Amount
- Lens diameter
- The thickness of the reference point
- Index of refraction
- Dispersion coefficient
- Wear
- Visible Transmittance
- UV performance
- Yellow Index
- Flammability
- UV performance
- Impact resistance
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