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Lemon juice ink how to#

While the ink is exposed to direct heat like with sunlight, blow dryer, iron, oven and light bulb, the lemon juice acid will make the letter turn a different color and then the message becomes visible. If we use a different fruit like orange juice instead of lemon juice it would not work because it does not attract heat.

Using a paint brush would also work for this experiment.

Without heat for this experiment the experiment would not work because the lemon juice attracts the heat.

What would you predict would happen if we used a different fruit? (for example an orange).

Why are lemons so important in this experiment?.

What materials could you use instead other than q-tips?.

Why is heat important with this experiment?.

Don’t forget to let the paper dry before putting it in heat.

Use a heat source to decode the secret message.

You can use your hands or, if you have any unhealed scratches, a juicier.

Squeeze the lemon juice into the small container.

Students will be able to identify that not needing much can make a cool experiment.

Students will be able to see how impactful sunlight is.

Students will be able to observe how lemon juice can make ink using sunlight.

Copy the Google Doc in your own drive and make edits or you can just print.īy the end of this experiment, students will be able to: *You can use the document in the link below to either: tailor the experiment to your needs or to have a printable version of this lesson plan* Super easy and super cool for any student! By doing this experiment they will only need three supplies.

Lemon juice ink how to#

Students will be experiencing how to make invisible ink using sunlight and lemon juice.