Measuring Equipment
MI for Particulate Filtration Efficiency
MI for Particulate Filtration Efficiency
MI for Facial Inhalation Resistance
MI for Facial Inhalation Resistance
MI for Tensile Strength
MI for Tensile Strength
MI for Leak rate
MI for Leak rate
Criterion and Grade of mask
| Grade | Criterion | ||
| Particulate filtration Efficiency | Facial Inhalation | Leak Rate | |
| KF80 | Over 80% (Sodium Chloride Test) | Below 6.2 ㎜H2O or 60 ㎩ | Below 25% |
| KF94 | Over 94% (Sodium Chloride and Paraffinic Oil test) | Below 7.2 ㎜H2O or 70 ㎩ | Below 11% |
| KF99 | Over 99.0% (Sodium Chloride and Paraffinic Oil test) | Below 10.3 ㎜H2O or 100 ㎩ | Below 5% |