Compound First stage Second  stage Third  stage Remaining Weight after 650°C
Temperature
(°C)
Weight loss (%) Temperature 
(°C)
Weight loss (%) Temperature 
(°C)
Weight loss (%)
HL1 200 61.9 320 38.1 - - Ash
HL3 145 59.8 400 39.9 - - Ash
HL5 112 5.4 225 33.6       284 58.7 Ash
Table 3: Weight losses percentage of HL1, HL3 and HL5.