QB 2506-2001 in English

1 Scope

This Standard specifies the requirements, test method, inspection rules, marking and packaging of spectacle lenses of optical resin (hereinafter referred to as "lenses").
This Standard is applicable to single-vision or multi-focal spectacle lenses for correction of refractive errors that are made of high-polymer synthetic material with optical property, but not applicable to progressive addition lens.

2 Normative References

The following standards contain provisions which, through reference in this text, constitute provisions of this Standard. At the time of publication, all editions indicated are valid. All standards are subject to revision, and Parties concerned are encouraged to discuss the possibility of applying the latest edition of the following standards.
GB/T 2409-1980 Plastics; Yellow Index Test Method
GB/T 2410-1980 Transparent Plastics; Transmissivity and Haze Test
GB/T 2828-1987 In-Batch Inspection Computation Sampling Procedure and Sampling Table (Applicable to In-Batch Inspection)
GB 10810-1996 Spectacles Lenses
QB 2457-1999 Sunglasses

3 Definitions

For the purpose of this Standard, the definitions established in GB 10810 apply; meanwhile the following definitions are adopted.
3.1 Yellow index YI

Foreword I
1 Scope
2 Normative References
3 Definitions
4 Requirements
5 Test Methods
6 Test Rules
7 Mark and Packaging
Appendix A (Normative) Calculate Spectrum Distribution Constant of Ultraviolet Transmittance and Luminous Transmittance
Appendix B (Informative) Test Methods of Shock Resistance