KF94

Initialism of Korean Filter with 94% filtration efficiency.

KF94 (countable and uncountable, plural KF94s)

1. (uncountable) An air particulate filtration standard originating in the Republic of Korea, South Korea, which requires filtration of 94% of air particulates.
   • 2022 January 14, Tara Parker-Pope, “How to Find a Quality Mask (and Avoid Counterfeits)”, in The New York Times‎^[1], archived from the original on 15 January 2022:

     However, some fake masks made in China may be labeled KF94, so shoppers still need to do their homework.

2. (countable) Ellipsis of KF94 filter, a filter implementing the standard.
3. (countable) Ellipsis of KF94 mask, a facemask using a filter conforming to the standard.
   • 2022 January 14, Tara Parker-Pope, “How to Find a Quality Mask (and Avoid Counterfeits)”, in The New York Times‎^[2], archived from the original on 15 January 2022:

     Unlike cloth masks, high-quality masks — called N95s, KN95s and KF94s — are made with layers of high-tech filtering material that trap at least 94 to 95 percent of the most risky particles.

• N95 (U.S. standard, similar and almost equivalent to the Korean standard)
• KN95 (Chinese standard, similar and almost equivalent to the Korean standard)

From Korean English KF94, as coined in South Korea.

KF94

1. KF94 filtration standard

From Korean English KF94, from Initialism of Korean Filter with 94% filtration efficiency.

KF94 • (KF94)

1. KF94
   1. A filtration standard
   2. A filter implementing the standard
   3. A mask using the filter of that standard

• English: KF94
• French: KF94
• Spanish: KF94

From Korean English KF94, as coined in South Korea.

KF94

1. KF94 filtration standard