Question

INVISIBLE INK
This low-tech Invisible ink science experiment lets kids send secret messages to friends and
family. All they'll need is a little lemon juice or milk. We decided to try both versions of this
invisible ink experiment to see if the results were any different.
Commonly found household items make up the ingredient list, including juice, milk, honey, and
vinegar. At room temperature, these compound liquids are colorless, making them perfect for
invisible ink fun. Put them in contact with heat and the oxidization process turns them various
shades of brown, aka, the Ink appears! Read on for step-by-step instructions on how to make
invisible ink with your kids.
Step 1
Gather your ingredients and tools. For this experiment, you need a piece of paper, a cotton swab,
a heat source (a lamp or electric stove works), and milk or lemon.
Step 2
If you are using lemon juice, squeeze your lemon into a glass. You can mix it with a little bit of
water. Dip your cotton swab into the milk or lemon juice and start writing your message. Let your
message dry completely.
Step 3
Once dry, an adult should hold the sheet of paper over a heat source. We used an electric
stovetop. You can also use a lamplight or blow-dryer.
Step 4
As the milk or lemon "ink” heats up, it will oxidize and turn brown. You can try this experiment
with other substances such as vinegar, honey, or orange juice.​

Answer 1

Answer:

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