A letter is written but the ink fades away in hours. What type of ink was used?
Category: Mystery · Difficulty: easy
Hint: Some inks are designed to vanish after time passes.
Answer
An ink made from disappearing chemicals
Explanation
Certain chemicals in disappearing ink cause it to evaporate or lose color after a short while.
This is an easy mystery riddle — a good one for children and beginners. The answer is An ink made from disappearing chemicals.
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