How can the filter stop particles of different sizes?

The filter used is composed of 5 layers of polypropylene and activated carbon.

Filter structure

The filter we use consists of fibers, the trapping of particles on the fibers results from the combination of several mechanisms, the four main ones are Brownian scattering, direct interception, inertial impaction and electrostatic effects.

The particles of very small size are subjected to Brownian agitation (principle (1): their trajectories are disordered and random.When a particle passes near an obstacle, like a fiber, it can impact it and adhere to it. The smaller a particle is and the more it will be subjected to this Brownian motion, this phenomenon is therefore predominant for particles with a diameter of less than 0.1 μm.

The particles entrained in the air flow caused by the inspiration can be intercepted directly by the fiber which is in the path or in the immediate vicinity of the current line carrying the particle. This phenomenon is direct interception and it concerns rather particles with a diameter greater than 0.1 μm.

Particles of larger sizes, from 1 μm, have a greater inertia that does not allow them to follow the current lines that bypass the fiber and will collide with it. This is the inertial impaction.

Charging the fibers electrically increases the probabilities of particle impaction by increasing the electrostatic attraction forces.

Particles filtering action


Why are we talking about CE certification for an anti-pollution mask?

The CE marking (in force since 1993) is the main indicator of a product's compliance with EU legislation and allows free movement within the European market. By affixing the marking on its products, the manufacturer declares to respect all the obligations provided for marking. CE marking certifies the conformity of a product with the planned European legislation (eg harmonized safety legislation) before it is put on the market. The marking indicates that the manufacturer or importer has checked the conformity of the product with the basic requirements of safety, hygiene and environmental protection.

The anti-pollution masks are personal protective equipment (PPE), subject to the European standard EN 149: 2001 + A1: 2009. Compliance must also be certified by a third party inspection agency, APAVE in our case.

What does FFP2 mean?

Filter half-masks against particles are classified according to their filtration efficiency and their total inward leakage. There are three classes of devices: FFP1, FFP2 and FFP3.

A class FFP2 anti-pollution mask means that:

- More than 94% of the breathed air is filtered

- And that air leaks inwards are less than 8%

The notion of respiratory resistance is also taken into account. And it is an important factor for the comfort of use. Indeed, a mask certified FFP3 class would be much less comfortable to wear in everyday life and more so during sports activities such as cycling, running ... because the breathing resistance is stronger. In simplified language, you need to make much greater inspiration efforts with a mask classified in FFP3.

Does the Blossum-Mask Lite anti-pollution mask filter everything?

Yes almost everything! Certified for the FFP2 class, this means that over 94% of the breathed air is filtered, including fine particles.

Can there be air leaks with the Blossum-Mask Lite Spray Mask?

Our mask has been designed to meet the requirements of certification tests performed by APAVE, a French notified body, recognized for its rigor. The air leaks for this mask have been tested and meet the criteria imposed by the standard, less than 8% of air leakage inwards.

On the other hand, the mask is designed to adapt to different forms of face, thanks to a nose clip and an adjustable fastening system. Remember that the mask is available in 2 sizes and that it is important to choose the correct size.