He maha nga purongo kua tuhia e te etita mo te whakaurunga o te tipu bitumen whakaehunga. Kaore au i te mohio mena kua ata panui koe. I roto i te tirotiro a te etita, i kitea e ahau he maha nga kaiwhakahaere kaore i te tino mohio mo te tikanga whakamahana o te hanga punaha bitumen emulsion. , i tenei ra ka whakaatuhia e matou ki a koe i roto i nga korero taipitopito, e tumanako ana ahau kaore koe e ngaro.

I roto i te meka, ka tae mai te reira ki te tikanga whakawera pūnaha hanga taputapu bitumen whakaehunga, kua wehea ratou ki toru momo, tae atu hau, waiariki hinu me te tika tuwhera mura. I roto i a raatau, ko te whakamahana hau he punaha whakamahana e whakawhirinaki ana ki te hau rewharewha teitei i hangaia e te wera. Ko tenei tukanga e hiahia ana ki te awhina o te ngongo ahi. Ko te whakamahana hinu wera ka whakawhirinaki ki te hinu waiariki hei kaupapa whakamahana. Hei whakamahana i te hinu whakawhiti wera, me tino tahuna te wahie ki te whakawhiti i te kaha wera ki te hinu whakawhiti wera, katahi ka whakamahia he papu hinu hei kawe i te wera me te whakamahana i te otinga. Ko te mea whakamutunga ko te whakawera mura tuwhera tika. He tino rawaka te tuku waro, he tino ngawari, he watea hoki te kawe waka, no reira he tino ngawari, he pai, he tika hoki te whakahaere. He pai ake mo te tukanga motuhake o te hoahoa whakahou. Mena kei te pirangi koe ki te whakaiti pai i te kaha o te mahi, ka taea e koe te whakawhirinaki ki te toki aunoa hei taapiri i te kaha.