铅笔是否会导致铅中毒的问题常常困扰着很多人,因为产生这种疑问的人往往认为铅笔芯中含有铅,使用含铅的铅笔就自然有导致铅中毒的可能。那铅笔芯中到底含不含铅?公元16世纪,人们在英格兰的博罗代尔发现了一种黑色矿物——石墨,而当地的一些牧羊人发现可以用石墨在羊身上画上记号。人们受此启发把大块石墨切成小条用来写字和 The question of whether or not a pencil causes lead poisoning often plagues many people, because often the person who produces the question thinks that there is lead in the pencil lead and the use of lead-containing pencils naturally leads to the possibility of lead poisoning. In the 16th century, people found a kind of black mineral - graphite in Borodale, England, and some local shepherds found that they could mark the sheep with graphite. Inspired by this, people cut large pieces of graphite into strips and wrote them