To increase their strength and smoothness the leads are then treated with a hot mixture which includes candelilla wax from Mexico, paraffin wax, and hydrogenated natural fats. 为了提高其强度和顺滑性,还要用一种滚热的混合物处理铅笔芯,其中包括固体石蜡、经过氢化处理的天然脂肪和产自墨西哥的大戟石蜡。
Hernandez is a farmer who plants and collects the Candelilla plant used in making Candelilla wax(E902). 赫纳德兹是一名农夫,靠种植和收集蜡大戟为生,这种沙漠植物可以用来提取小烛树蜡。