Te tiaki me te tiaki i te pūwhakamātao: Kei roto i te wai whakamatao e whakamahia ana i roto i te pūwhakamātao wai-whakamatao ngā poke maha ka tau ki roto i te ngongo parahi pūwhakamātao i roto i te wā, koinei te mea e kiia ana e te tangata he unahi. Mena he nui rawa te unahi, ka ngoikore te pānga o te pūwhakamātao, ka piki ake te pēhanga putanga hau i roto i te pūnaha, ā, ka pā tika te pāmahana putanga hau ki te pānga o te whakamatao. Nō reira, me tiaki tonu me te tango unahi, i te nuinga o te wā kotahi i te tau.
E toru ngā tikanga horoi:
1. Whakamahia he paraihe horoi hei tōia whakamuri, whakamuri hoki hei horoi i te ngongo parahi whakapūmau.
2. Whakamahia he waru motuhake hei hurihuri, hei waru hoki hei horoi. Kāore tēnei tikanga e whakamahia whānuitia ana hei horoi i te ngongo parahi whakapūmau.
3. Whakamahia ngā tikanga matū hei horoi i te ngongo parahi whakapūmau.
Ko te tauira o te otinga horoi matū mō te whakapūpū i ngā ngongo parahi: 500kg o te otinga wai waikawa hauwai 10% me te 250kg o te aukati waikura (ko te ōwehenga he 1kg o te otinga wai waikawa hauwai me te 0.5g o te aukati waikura). Ko te aukati waikura he hexamethylenetetramine (e mōhiotia ana ko te urotropine). I te wā e horoi ana, honoa tika te papu waikawa ki te whakapūpū. Ko te wā tohanga o te papu waikawa he tata ki te 25~30 hāora. Hei whakamutunga, whakamahia te otinga 1% NaOH, te 5% Na2C03 rānei hei horoi me te huri haere mō te 15 meneti hei whakakore i te waikawa e toe ana i roto i te whakapūpū. Ka taea hoki e koe te whakamahi i tētahi kaihoko tango tauine motuhake hei huri haere mō te 40~60 meneti.
Tikanga horoi o te pūwhakamātao hau: Whakamahia te hau pēhanga teitei hei pupuhi atu i te unahi i runga i ngā tara pūwhakamātao, whakamahia rānei he kaihoko horoi motuhake hei horoi.
Wā tuku: 11-Pepuere-2025
