引用:
作者ocean002
基於石英玻璃的特性,如果玻璃管壁上沾染了油污(例如用手觸摸燈泡的玻璃殼),將導致上述再生循環過程不能良好完成,從而大大影響燈泡的壽命,需要用酒精進行清除。
原來汽車大燈不能有指紋就是這個原因 上了一課 
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中文 wiki 的解釋有問題。再生循環是在燈泡內發生的,和燈泡外壁上的油污有什麼關係?
英文 wiki 上是這麼寫的:
Any surface contamination, notably the oil from human fingertips, can damage the quartz envelope when it is heated. Contaminants will create a hot spot on the bulb surface when the lamp is turned on. This extreme, localized heat causes the quartz to change from its vitreous form into a weaker, crystalline form that leaks gas. This weakening may also cause the bulb to form a bubble, weakening it and leading to its explosion.
油污會造成石英玻璃溫度不均勻,會產生局部溫度較高的區域,使得石英玻璃從玻璃相(非結晶相?) 轉變成結晶相,而產生漏氣的現象。