This standard prescribes the requirements and methods of test for filter-type respirators for protection against particulate matter.



按照印度的法律，相关物资在出口印度时，需向印度海关申报
Central Board of Indirect Taxes and Customs (erstwhile Central Board of Excise & Customs) is a part of the Department of Revenue under the Ministry of Finance, Government of India

印度IS 9473
分为FFP1 ，FFP2 ，FFP3 三个等级
FFP1 最低过滤效果≥80% 
FFP2 最低过滤效果≥94% 
FFP3 最低过滤效果≥97%