Ballpoint pen that writes custom LEDs on paper
engineering.wustl.edu
Ballpoint pen that writes custom LEDs on paper
1–3 of 3 posts
Re: Ballpoint pen that writes custom LEDs on paper
#2This is incredible!
I wonder how expensive this perovskite thing is, and how much it costs to make the ink.
ie, what would be a reasonable guesstimate of the cost of a BIC LED pen?
Re: Ballpoint pen that writes custom LEDs on paper
#3This is incredible! I wonder how expensive this perovskite thing is, and how much it costs to make the ink. ie, what would be a reasonable guesstimate of the cost of a BIC LED pen?
Perovskite is not very expensive but the process to make it “as a gel” I think it’s expensive because is complex.