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ISO 4851:1979
M00003222
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ISO 4851:1979 Personal eye-protectors - Ultra-violet filters - Utilisation and transmittance requirements
standard by International Organization for Standardization, 02/01/1979
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Full Description
Gives the numbering of and transmittance requirements for filters. It defines guidance and their selection and use. Optical test methods form the subject of ISO 4854. Non-optical test methods form the subject of ISO 4855. The symbol for filters includes a code number and the shade number corresponding to the filter. The determination of transmittance is described in clause 5 of ISO 4854.