How to make your own invisible ink

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What is invisible ink?

Invisible ink is a substance used for writing that is invisible when first applied, but can later be revealed by some means. Invisible inks are used in a variety of ways, from secret writing to crime scene investigation.

There are many recipes for invisible ink, but they all work by using a chemical reaction to make the writing appear. The most common invisible inks are made with lemon juice, milk, or vinegar. When these substances are applied to paper, they leave an invisible mark.

To reveal the hidden message, the paper must be heated. The heat causes the chemical reaction to occur, and the writing will appear.

How to make invisible ink with lemon juice

Ingredients:

-Lemon juice

-Paper

-Heat source (lighter, candle, etc.)

Instructions:

1. Write your message on a piece of paper using lemon juice. Be sure to write slowly and evenly for the best results.

2. Allow the lemon juice to dry completely.

3. Hold the paper close to a heat source. The writing will appear as the paper heats up.

How to make invisible ink with milk

Ingredients:

-Milk

-Paper

-Heat source (lighter, candle, etc.)

Instructions:

1. Write your message on a piece of paper using milk. Be sure to write slowly and evenly for the best results.

2. Allow the milk to dry completely.

3. Hold the paper close to a heat source. The writing will appear as the paper heats up.

How to make invisible ink with vinegar

Ingredients:

-Vinegar

-Paper

-Heat source (lighter, candle, etc.)

Instructions:

1. Write your message on a piece of paper using vinegar. Be sure to write slowly and evenly for the best results.

2. Allow the vinegar to dry completely.

3. Hold the paper close to a heat source. The writing will appear as the paper heats up.

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