Hysteresis manifests itself in state transitions when melting temperature and freezing temperature do not agree. For example, agar melts at  and solidifies from . This is to say that once agar is melted at 85 °C, it retains a liquid state until cooled to 40 °C. Therefore, from the temperatures of 40 to 85 °C, agar can be either solid or liquid, depending on which state it was before.