Special ink that becomes visible or invisible based on pH levels.
ChemicalWriting MaterialSecurity
Current best complexity is 51:
Acidic Ink can be discovered in Concepts, categorized under Chemical, Writing Material, Security. Special ink that becomes visible or invisible based on pH levels.
It has been discovered by 1 board and crafted 1 time, first appearing 20 hours ago. Acidic Ink can be created from 1 recipe, and goes on to appear as an ingredient in 1 other.
Acidic Ink was first discovered by What is a human 20 hours ago. They also hold the lowest-complexity recipe, at 51.
Related concepts worth exploring include Hydrogen Peroxide, Barrier, Bleach, Napalm, Fence, Tar, and 6 more.