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In December 2015 Standards Australia published an updated version of the “Single – use face masks for use in health care” Ultra Health Surgical Masks comply with AS4381:2015. The new standard replaces the old General Purpose, Submicron & Fluid Resistant terminology with a simplified Level 1 2 & 3 ratings. These are as follows;

Characteristics Level 1 Level 2 Level 3
Level 1
barrier medical face mask materials are evaluated for resistance to penetration
by synthetic blood at the minimum velocity specified in Table 2, bacterial
filtration efficiency and differential pressure.APPLICATIONS:
For general purpose medical procedures, where the wearer is not at risk of
blood or bodily fluid splash or to protect staff and/or the patient from
droplet exposure to microorganisms (e.g. patient with upper respiratory tract
infection visits GP)
Level 2
barrier medical face mask materials are evaluated for resistance to penetration
by synthetic blood at the middle velocity specified in Table 2, bacterial
filtration efficiency and differential pressure.APPLICATIONS:
For use in emergency departments, dentistry, changing dressings on small or
healing wounds where minimal blood droplet exposure may possibly occur (e.g.
endoscopy procedures)
Level 3
barrier medical face mask materials are evaluated for resistance to penetration
by synthetic blood at the maximum velocity specified in Table 2, bacterial
filtration efficiency and differential pressure.APPLICATIONS:
For all surgical procedures, major trauma first aid or in any area where the
health care worker is at risk of blood or bodily fluid splash (e.g.
orthopaedic, cardiovascular procedures)
Bacterial Filtration,Efficiency (BFE) % >95% >98% >98%
Particulate Filtration,Efficiency (PFE) % (0.1um) Not Required Not Required Not Required
Differential Pressure,(Delta P) mm H2O/cm2 < 4.0 < 5.0 < 5.0
Resistance to Penetration,By synthetic blood (fluid resistance)
min pressure in mm Hg for pass result
80mm Hg 120mm Hg 160mmHg