本研究主要探討,以不同成分比例之脂肪酸(包含十二碳,十四碳,十六碳,十八碳)與石蠟混合組成之蠟燭,其燃燒速率變化情形,進而對是受此類蠟燭作比較,以尋求較佳耐燒度且火焰穩定之蠟燭,解果以九份之石蠟混合一份十六碳酸所組成之蠟燭較優,其燃燒速率為0.083g/min,火焰高度3.3±0.2cm。另外又以九份之石蠟混合一份十二碳飽和酸所組成之蠟燭火焰最高,為5.9±0.5cm。 This research is to study the situation rate ey different compositions and porportional faty acid incldung lauric acid ,myristic acid,plmiic acid and stearic acid with pa-raffin wax mixed candles, furthermore, to compare the situations with the market candle like commodities for its better durable combustion and stable flame. The best result comes with 9 of the paraffin wax mixed 1 of the palmitic acid. The combustion rate is at O.083 g/min and the flame hight is at 3.3t0.2 cm. Besides, the candle comes with 9 of the paraaffin wax mixed 1 of the lauric acid that has the highest flame is at 5.9t0.5 cm.