I was about to write a short post about the lead that I assumed was in early lead pencils, but it turns out [0] that there never was any lead in lead pencils and they are humorously mis-named.
[0] https://en.wikipedia.org/wiki/Pencil#Discovery_of_graphite_d...
At the same time, it's also nice to have some rules and regulations and people who enforce them so that, say, one of the suppliers tries to start using toxic ingredients in the pencil's paint, and gets thrown in jail for it.