this post was submitted on 14 Apr 2025
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Science Memes

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[Partially incorrect, see comments.] Pens in Space (mander.xyz)
submitted 1 week ago* (last edited 1 week ago) by [email protected] to c/[email protected]
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[–] [email protected] 20 points 1 week ago (1 children)

Also a broken bit of lead could easily float into someone's eye or get aspirated.

[–] [email protected] 6 points 1 week ago (2 children)

There is no way either side used lead pencils. Saying lead is in pencils is a very outdated thing, it's all graphite these days.

[–] [email protected] 4 points 1 week ago* (last edited 1 week ago)

A sharp piece of graphite from a broken pencil is not something you would want in your eyes either

[–] [email protected] 16 points 1 week ago (1 children)

it hasn’t been graphite for while now either….

pencil lead

[–] [email protected] 3 points 1 week ago (2 children)

Chalk isn't chalk?

[–] [email protected] 5 points 1 week ago

Regular chalk is calcium carbonate. Crayola's website says their sidewalk chalk uses calcium sulfate (gypsum as an ingredient in plaster of paris).

So they're both calcium salts.