How to Make invisible ink
Write a secret message with invisible ink using these simple household items.
Step 1: Put lemon juice in bowl
Put the lemon juice in a bowl and dip your cotton swab in the lemon juice.
TIP: Using milk, vinegar, or orange juice instead of lemon juice will have the same effect.
Step 2: Write your message
Write your secret message on the paper with your cotton swab and let the writing dry completely. The message will be invisible when the message dries.
TIP: You can use a paintbrush or a toothpick instead of a cotton swab.
Step 3: Heat the paper
Hold the paper near the light bulb to expose it to the heat, but don't rest the paper on the bulb.
Step 4: Message appears
Watch in amazement as the message magically appears. The words will appear in a tan or brown color.
Did you know? Arizona and California produce 95 percent of the U.S. lemon crop.