How can I melt a whole candle into a liquid quickly without it cooling an turning back into a solid?

I am working on an experiment to see if the state of matter of a candle can affect its burn rate. However, I don t know how I can melt one candle quickly into a liquid and at the same time cool it down but preventing it from turning back into a solid. I want to have both candles starting at the same temperature.... show more I am working on an experiment to see if the state of matter of a candle can affect its burn rate. However, I don t know how I can melt one candle quickly into a liquid and at the same time cool it down but preventing it from turning back into a solid. I want to have both candles starting at the same temperature. Any ideas?
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