Te tohu tika o te taiaho UV, te miihini moroiti PCB/FPC, te whakairo karāhe me te uku, te whakairo mata kirihou, te tuhi papa haurua-haurua, te tukatuka kiko o ngā wāhanga hauora.
E 20 tau te roangaru e arotahi ana ki te whakarato i ngā hua whatu tino tika.