White.........ink?!?!?!!?!? It's not from a pen!
Someone discovered the powder.
Now we can have spy talk without the muggles discovering it .. that's genius
LOL yeah, that's like the whole point of this.
It doesn't work because of
The Recipe how to reveal White Ink
1.f3 e5 2.g4 Qh4#
White.........ink?!?!?!!?!? It's not from a pen!