Product est applicabilis ad en149 test vexillum: respiratoriorum tutela fabrica-percolantur anti-particula semi-larva; Conforming Signa: BS en149: MMI + A1: MMIX respiratoriorum tutela fabrica-percolantur anti-particula semi-larva requisitis test Mark 8.10 Blocking test, en143 7.10 et alia test signa.
Blocking test principle: the filter and mask blocking tester is used to test the amount of dust collected on the filter, the respiratory resistance of the test sample and the filter penetration (permeability) when the air flow passes through the filter by suction in a certain Pulvis elit et ad quadam respiratoriae resistentiam.