Basic knowledge of masks.

Focus on multiple fields, fibre-optic laser cutters, carving machines, sculptors, carvings.

The common sense of the mask -

The N series is an American standard;

KN series are Chinese standards;

The FFP series are European standards;

The larger the number, the higher the level of protection! It is easier to understand in a formula: FFP3>FFP2=N95=KN95>KN90 with a V at the end, indicating a valve.

All 95 headlines are N95 series.

The 90 series doesn't have a 95-grade shield, but it's over 90% better than the usual mask!

In general, the N95 series, which is used to combat viruses and influenza, is sufficient to present several different criteria for masks, given that the choice of masks is confusing and that they may not be useful.

The mask type and performance standards are on the left side of the mask.

The mask is divided into three criteria: n95 is produced by NOISH at United States standards, with 3M and Honiwel;

FFP2 is the European standard EN149; KNPC 95 is the Chinese standard GB2626-2006.

All three types of masks bearing performance standards are qualified masks.

ii. Medical mask n95 requires high-pressure liquid spray, so it is a higher standard than normal n95;

In the case of 3M, models 1860 and 9132 are the most commonly used medical masks.

In addition, there are 1860s of children's money. Ordinary persons, or medical personnel not exposed to high pressure liquid spray, may choose a normal n95 mask that meets NOISH standards.

European producers of FFP2 standard masks include German UVEX, etc.; FPP3 is a higher level (99) shield.

The Chinese standard GB2626-2006 refers to the normal KN95 mask standard. The medical mask for KN95 is GB19083-2010. (Similarly, regular KN95 masks can be used by ordinary people and medical personnel who do not come into contact with high pressure liquid spray. I'm not sure.

Another common problem is whether the mask is selected with or without a valve? Common valve masks are more comfortable. Medical masks do not allow valves. When a common human being is infected or suspected to be infected, a medical mask without a valve must be chosen.

vi. Medical surgical masks, commonly YY0469-2010 or YY0469-2011, printed on a separate overpack for each mask.

N.B.: 1860 / 1870 + This model is for medical operations, dampproof dust, etc.;

8210 / 8511 This model is for construction works, dust protection etc.;

9210+ This model is used for industrial works, dustproofing and scavenging, etc.; from abroad, it is likely that the building will be bought with a N95 dust mask, completely anti-viral!

The following two sections, which have been purchased in large quantities, including the famous 3M brand, although all of them are N95, are purely building dust masks, only suspended particles/microdust/powder, etc., totally viral, expensive but ineffective for new types of pneumonia, and must be clearly seen. N95 is a mask level and must have been purchased with an 1860 / 1870+ model, or with the words anti virus, surgical, flu-fighter, otherwise useless!

Created:

2020-11-20

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