I mua i te mārama ki ngā kaiwhakatairanga piri, me mārama tuatahi tātou he aha te piri.

Piripiri: Ko te āhuatanga o te piri i waenga i te mata totoka me te hononga o tētahi atu rauemi mā roto i ngā kaha ngota. Ka taea te whakakotahi i te kiriata paninga me te papa mā roto i te hononga ā-ringa, te mimiti ā-tinana, te hononga hauwai me te hononga matū, te horapa tahi me ētahi atu pānga. Ko te piri i puta mai i ēnei pānga ka whakatau i te piri i waenga i te kiriata peita me te papa. Ko tēnei piri me rite ki te tapeke o ngā kaha piri (ngā kaha piri) i waenga i te kiriata peita me te papa.
Koinei te āhuatanga matua o ngā paninga hei tiaki, hei whakapaipai, hei mahi motuhake hoki. Ahakoa he tino pai ngā āhuatanga ā-tinana, ā-matū hoki o te paninga, kāore e nui te uara mahi mena kāore e taea te piri pūmau ki te mata o te papa, ki te paninga turanga rānei. E whakaatu ana tēnei i te hiranga o te piri ki te mahi paninga.
Ki te kore e pai te piri o te kiriata peita, ka taea te mahi i ngā mahi pēnei i te huri i te papa, te whakaiti i te matotoru o te hanganga paninga, te whakanui ake i te pāmahana hanganga, me te whakamaroke hei whakapai ake i te kaha here ā-pūkaha me te pānga horapa, kia pai ake ai te piri.

Ko te kaiwhakatairanga piri he matū e whakarei ake ana i te hononga i waenga i ngā mata e rua, kia kaha ake ai, kia roa ake ai hoki te mau.
Ko te tāpiri i ngā kaiwhakatairanga piri ki te pūnaha paninga tētahi o ngā huarahi tino whai hua hei whakapai ake i te piri.

E whā ngā momo mahi a ngā kaiwhakatairanga piri:
Te punga matū mō te kiriata peita me te papa;
Te punga matū mō te kiriata peita me te takai ā-tinana mō te papa;
Te takai ā-tinana mō te kiriata peita me te punga matū mō te papa;
Te takai ā-tinana mō te kiriata peita me te papa peita.

Te whakarōpūtanga o ngā kaiwhakatairanga piri noa
1. Ngā kaiwhakatairanga piri pūmua waro. Ko ēnei kaiwhakatairanga piri he maha ngā rōpū punga papa pēnei i te hydroxyl, te carboxyl, te phosphate, ngā hanganga pūmua mekameka roa rānei, e whakapai ake ana i te ngāwari o te kiriata peita me te whakarei ake i te piri o te kiriata peita ki te papa.
2. Ngā kaiwhakatairanga piri o te kaihopu silane. Whai muri i te paninga me te iti o te kaihopu silane, ka heke te silane ki te hononga i waenga i te paninga me te papa. I tēnei wā, ina tūtaki ki te makuku i runga i te mata o te papa, ka taea te whakawhaiti hei hanga i ngā rōpū silanol, kātahi ka hanga hononga hauwai me ngā rōpū hydroxyl i runga i te mata o te papa, ka whakapūmau rānei hei hononga Si-OM (M te mata o te papa); i te wā kotahi, ka whakapūmau ngā rōpū silanol i waenga i ngā ngota silane ki a rātou anō hei hanga i tētahi hanganga whatunga e hipoki ana i te kiriata.

Ngā āhuatanga hei whakaaroaro i te wā e whiriwhiri ana i ngā kaiwhakatairanga piri
Hototahitanga pūnaha;
Te pumau o te rokiroki;
Te awe ki ngā āhuatanga ā-tinana me te matū taketake o ngā paninga;
Te maimoatanga mata o ngā papa;
Te whakakotahi me ētahi atu rauemi mata hei whakapai ake i ngā hanganga paninga.