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sklademVydáno: 2019-09-19
PD ISO/TR 21958:2019
Ophthalmic optics. Review of the test methods used to assess scratch and abrasion resistance of spectacle lenses
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| Označení normy: | PD ISO/TR 21958:2019 |
| Počet stran: | 26 |
| Vydáno: | 2019-09-19 |
| ISBN: | 978 0 539 01129 6 |
| Status: | Standard |
DESCRIPTION
PD ISO/TR 21958:2019
This standard PD ISO/TR 21958:2019 Ophthalmic optics. Review of the test methods used to assess scratch and abrasion resistance of spectacle lenses is classified in these ICS categories:
- 11.040.70 Ophthalmic equipment
This document describes the most commonly used test methods considered in standardization work relating to scratch and abrasion resistance of plastic spectacle lenses along with their technical capacities and limitations. It includes the ISO� test method for assessment of claims for basic abrasion resistance in ISO� 8980-5.
This document is intended to be of benefit to any future interest in ISO� standardization on scratch and abrasion resistance of spectacle lenses.