1. O mea tau eletise eseese e fa'avasegaina e fa'atatau i tulaga saogalemu mo le fa'aoga i totonu o le kasa pa, ua vaevaeina i sone: Sone 0, Sone 1, ma Sone 2.
2. Le fa'avasegaina o le kesi po'o le ausa mea pāpā paluga pa'u i vaega e tolu: IIA, IIB, ma IIC. O lenei fa'avasegaga o lo'o fa'avae muamua ile Va'a Saogalemu Fa'ata'ita'i Maualuga Maualuga (MESG) po'o le La'ititi la'ititi o le fa'amumuina o le taimi nei (MICR).
3. O le vevela fa'avasegaina mo le fa'amumuina o se ala fa'apitoa e vaevaeina i ni vaega se tele. E aofia ai le T1: lalo ifo o le 450°C; T2: 300°C < T ≤ 450°C; T3: 200°C < T ≤ 300°C; T4: 135°C < T ≤ 200°C; T5: 100°C < T ≤ 135°C; T6: 85°C < T ≤ 100°C.