Specifies the numbering of and transmittance requirements for filters intended to protect operatives performing manual work involving welding, braze welding, arc gouging and thermal cutting. It also gives guidance on the selection and use of these filters. Optical test methods are the subject of ISO 4854. Non-optical test methods are the subject of ISO 4855.
WITHDRAWN
ISO 4850:1979
95.99
Withdrawal of Standard
Mar 2, 2021
PUBLISHED
ISO 16321-2:2021
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