How to make Invisible Ink
Step by Step Instructions
- Squeeze the lemons to obtain its juice
- Use the juice as ‘ink’ by applying it to the brush or cotton bud and write on the paper.
- When you are ready to read your invisible message, hold the paper up to sunlight, or even a light bulb.
- The heat from its source will cause the writing to darken to a pale brown, which will enable you to read your invisible message.
- When you are ready to read your invisible message, hold the paper next to a heat source or put it in direct sunlight for a while.
- You can even try submerging it very gently into water. Once the paper dries, your secret message will be magically appear.
- Paper 1
- Lemon or Lemon Juice 2
- Cotton buds or a paint brush 2
- Sunlight or another heat source 1
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