On 1 November 2016, the first Chinese standard GB/T32610-2016 Standard on protective masks for daily use has come into force, specifying that the masks are compliant only when they can help reduce the concentration of PM 2.5 inhaled to 75μg/m3 so that to enhance air quality to a good or better level by filtering.
The standard only appliers for protective masks used in daily life to protect us from particulars from air pollution. But respiratory protective articles for special industry or designed specifically for babies and children are not falling under the scope.
The standard classifies the masks into four classes: D, C, B and A.
- Class D: medium or lower pollution (the concentration of PM 2.5≤ 150μg/m3)
- Class C: heavy pollution (the concentration of PM 2.5 ≤150μg/m3)
- Class B: severe pollution (the concentration of PM 2.5 ≤350μg/m3)
- Class A: when the concentration of PM 2.5 reaches 500μg/m3
ITEM | REQUIREMENT | ITEM | REQUIREMENT |
Colour fastness to rubbing (dry/wet)/ Class≥ | 4 | Formaldehyde/(mg/kg)≤ | 20 |
pH Vlue | 4.0~8.5 | Cleavable aromatic amines /(mg/kg)≤ | Forbidden |
Epoxyethane residue /(μg/g) ≤ | 10 | Inspiratory resistance /Pa≤ | 175 |
Expiratory resistance /Pa≤ | 145 | Breaking force of the connections between mask cords and mask bodies /N≥ | 20 |
Cover fastness of expiratory valve | No slippage, breakage and transformation | Micro biological - Coliform group | ND |
Micro biological - Pathogenic pyogenic bacteria | ND | Micro biological - Total fungi colonies/(CFU/g)≤ | 100 |
Micro biological - Total bacteria colonies /(CFU/g)≤ | 200 | Lower view of masks≥ | 60゜ |
C&K Testing advises consumers to check the appearance when purchasing the products. Manufacturers should take notice of new regulations.
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