Chigoba chowotcherera chimatanthawuza chida chomwe chimateteza chitetezo cha ogwira ntchito panthawi yowotcherera ndi kudula.Dzina lodziwika bwino ndi chisoti chowotcherera.
Udindo wa kuwotcherera mask:
1. Chitetezo cha maso: fyuluta iwiri kuti mupewe kuwonongeka kwa ultraviolet ndi kuwala kwa infrared komwe kumapangidwa ndi arc, ndi kuwonongeka kwa maso chifukwa cha kuwala kwamphamvu, komanso kupewa electro-optic ophthalmia.
2. Kuteteza kumaso: kuteteza bwino ma splashes ndi matupi owopsa kuti asagwire ntchito kumaso ndikuchepetsa kupsa kwa khungu.
3. Chitetezo chopumira: Kalozera wamayendedwe a mpweya amatha kuchepetsa bwino mpweya woyipa ndi fumbi lotulutsidwa ndi kuwotcherera mthupi ndikuletsa kuchitika kwa matenda a pneumoconiosis pantchito.

IR yathu yoteteza masterbatch imatha kutsekereza 90% IR ndi 70% transmittance.