noun, noun which may take the genitive case particle 'no'
invisible writing revealed by heat; writing in invisible ink
Refers to the technique or the resulting text; often used in the context of secret messages or children's experiments.
子供の頃、レモン汁であぶり出しをして遊んだ。
When I was a child, I played with invisible writing using lemon juice.
あぶり出しの手紙を
When you hold a letter written in invisible ink over a flame, the characters appear.