international standard of Glasses and sunglasses frames test
International standard of Glasses and sunglasses frame testThe normal standard [...]
7 aspects to show Photochromic lens in Manufacturing and inspection
Photochromic lensWhat photochromic lens is?-Someone called Photochromic lens as Photosensitive [...]
7 points to cause dizziness when you wore sunglasses
When wearing sunglasses frames, many people find that [...]
How glasses manufactures made eyeglasses and sunglasses trims by casting
Parts 31. The metallic material of eyeglasses and sunglasses [...]
Metallic material of eyeglasses and sunglasses
Part 21. The Metallic material of eyeglasses and sunglasses. [...]
A List which covered all materials of eyeglasses and sunglasses frames
Part 1A List which covered all materials of eyeglasses and [...]
FAQ
FOR SAMPLE Q1：Could I buy 1 unit as a sample [...]