Where, by virtue of their nature and the foreseeable conditions of their use, certain substances and mixtures which are hazardous to health or harmful biological agents possess high penetrative power which limits the duration of the protection provided by the PPE in question, the latter must be subjected to standard tests with a view to their classification on the basis of their performance.
Nuair a bhíonn cumhacht ardtreáiteach, de bhua a gcineáil agus na ndálaí úsáide intuartha, ag substaintí áirithe agus ag meascáin áirithe atá guaiseach ó thaobh sláinte nó ag oibreáin dhíobhálacha bhitheolaíocha a chuireann teorainn le tréimhse na cosanta arna soláthar ag an TCP i dtrácht, ní mór tástálacha caighdeánacha a dhéanamh orthu chun iad a aicmiú ar bhonn a n-oibrithe.