ISO 4851-1979 Personal eye-protectors - Ultra-violet filters - Utilisation and transmittance requirements

First edition. International Standard ISO 4851 was developed by Technical Committee ISO/TC 94, Personal safety - Protective clothing and equipment, and was circulated to the member bodies in April 1977. — 4 p.
This International Standard specifies the numbering of, and transmittance requirements for filters for protection against ultra-violet radiation. It also gives guidance on their selection and use.