Question

what do you mean by high ignition temperature

Answer 1

the lowest temperature at which a combustible substance when heated (as in a bath of molten metal) takes fire in air and continues to burn — called also autogenous ignition temperature;Gasoline (Petrol) 247–280 °C (477–536 °F)
Ethanol 365 °C (689 °F)
Diesel or Jet A-1 210 °C (410 °F)
Butane 405 °C (761 °F)

Answer 2

High ignition temparature refers to the high temparature by which a substance catch fire.
High ignition temparature are generally low flammable substances i.e require great temparature to catch fire.
HOPED HELPFUL.