Technical data

#1 High Quality Mask Manufacturer Alvent

Bacteria Filtration Efficiency (BFE)

Bacterial Filtration Efficiency, or BFE, is a measure of a respirator material's resistance to bacterial penetration. The percentage is reported as result and relates to the fabric's ability to resist bacterial penetration. Higher numbers indicate better barrier efficiency in this test.

Particle Filtration Efficiency (PFE)

The Particle Filtration Efficiency (PFE) test evaluates the non-viable particle retention or filtration efficiency of the filter media and other filtration devices at submicron levels. This test is performed on face masks and on all filter media that allow 1 cubic foot per minute (CFM) flow to pass.

PFE (particle filtration efficiency) measures how well a mask filters submicron particles, viruses and bacteria with the expectation that they will be similarly filtered. The higher the percentage, the higher the mask effectiveness.

Breathing Resistance (Pa)

The Differential Pressure Tester is a laboratory test tool to determine the breathability of medical face masks, the test principle is to test the air exchange pressure of the medical face mask material by measuring the differential pressure required to draw air from a constantly measured surface area. air flow rate indicates the breathability of medical face masks. An internal water filled differential manometer is used to measure differential pressure and a mass flow meter is used to measure air flow. The electric vacuum pump draws air from the medical mask breathability tester and a needle valve is used to adjust the air flow rate.

Please see our results for Bacteria Filtration Efficiency (BFE), Particle Filtration Efficiency (PFE) and Breathing Resistance (Breathability-Pa) tests on our certifications page.

Particulate Matter (PM)

What is PM? PM (Particulate matter) is a current issue nowadays. Many are trying to explain how the masks are protective regarding PM levels. Here we clarify and explain PM levels and the danger it has on the human body.

Liquid droplets in the air

Particulate matter with the shortcut "PM" is particle contamination. More specifically, it is the term used for the use of solid particles and liquid droplets in air. Of course, every particle has different sizes. Look at the comparison above and you will understand how small the Covid-19 Virus is.

PM50-70 Human Hair

As seen in the picture to the left, average human hair is between 50-70 PM. The hair piece looks very thick compared to other burning particles and organic compounds.

PM10 Dust & Smoke

Some examples for PM10 will be dust and smoke. Incredibly, the % 90 cannot be seen with the naked eye.

PM 2.5 Fine Particles

PM 2.5 is almost 25 times smaller than a human hair or 40 times smaller than fine beach sand visible only under a microscope.

PM 1 Ultra-fine particles

PM1 has an aerodynamic diameter of less than 0.1 micrometers. Ultra fine dust is the most damaging type of fine particles because the particles directly penetrate the bloodstream from the lungs and thus spread to the organs.