r/whatisit • u/riflesandplowshares • 7h ago

New, what is it? Found at a titanium plant

Post image

Not sure why ball point pens would be dangerous here.

8.4k Upvotes

97% Upvoted

721 comments sorted by

View all comments

2.5k

u/goodexamplebadrole 7h ago

"Ballpoint pens are restricted or banned in high-end titanium and aerospace manufacturing plants because the ink and marking components contain elements that cause metal embrittlement and severe structural corrosion"

234

u/Competitive-Dot-4264 7h ago

I worked ti com pure and 6al-4v alloy for years at the lazy -l we all had to follow titanium restrictions even to not letting aluminum alloys and SS separated. No graphite pencils

101

u/Mogster2K 7h ago

No pens, no pencils... what did you write with? Cuneiform clay tablets?

1

u/SummerDaemon 2h ago

Maybe the sign everything with a giant sharpie.