Ko ngā whatu miro e whakatakotoria ana he angiangi ake i te 20-40% i ngā hua whatu i hangaia mai i te miro kotahi, ā, he rite tonu te hanganga.
He maha ngā paerewa Pākehā e hiahia ana kia iti rawa te hipoki rauemi mō ngā kiriuhi tuanui i ngā taha e rua o te paninga. Mā ngā paninga kua whakatakotoria ka āwhina ki te whakaputa hua angiangi me te kore e whakaae ki ngā uara hangarau kua heke. Ka taea te penapena neke atu i te 20% o ngā rauemi mata pēnei i te PVC, te PVOH rānei.
Ko ngā kiriuhi anake e āhei ai te hanga i tētahi kiriuhi tuanui papa-toru tino angiangi, ōrite, (1.2mm) e whakamahia pinepinetia ana i Ūropi Waenganui. Kāore e taea te whakamahi i ngā papanga mō ngā kiriuhi tuanui he angiangi ake i te 1.5mm.
Kāore e tino kitea te hanganga o te whatu whiri i roto i te hua whakamutunga, pērā i te hanganga o ngā rauemi whatu. Nā tēnei ka maeneene ake, ka ōrite ake te mata o te hua whakamutunga.
Mā te mata maeneene o ngā hua whakamutunga kei roto ngā kiriuhi kua whakatakotoria ka taea te whakarewa, te whakapiri rānei i ngā paparanga o ngā hua whakamutunga tetahi ki tetahi kia ngāwari ake, kia mau hoki.
Ka roa ake te ātete o ngā mata maeneene ki te paru, ā, ka mau tonu.
Wā tuku: Hurae-17-2020