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How do you reveal an answer on paper when you use milk or lemon juice when it's invisible?
Wiki User
∙ 13y ago
You just hold it over an incandescent light bulb and let it get warm and it will show up when it starts to warm.
Wiki User
∙ 13y ago
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What impact did invisible ink have on society?
Invisible ink was invented by Benjamin Franklin and is currently used in government documents as a secret code. Benjamin Franklin used lemon juice as the first invisible ink. The acid in the lemon juice weakens the paper where it has been spread. Therefore, if the paper is held over a candle or another heat source, the area where the lemon juice was spread will burn more easily. This will reveal the placement of the lemon juice.
How does lemon help invisible ink?
Lemon juice used in a pen will make clear writing (when dry) which will darken when the paper on which it was used is exposed to heat.
How do you make invinisble ink?
To make an invisible ink, one can use any acidic juice such as lemon, orange, or apple. This can be used to fill in a pen and carry it everywhere and anywhere. The invisible ink can be used to write on any paper. When paper is placed under candlelight, the secret message will be revealed.
What liquid work best in making invisible ink?
lemon juice and water mixture
Litmus paper dipped in lemon juice?
Lemon juice contains citric acid so blue litmus paper dipped in lemon juice will turn red indicating that it is acidic.
Why does lemon juice litmus paper red?
Lemon juice is an acid and blue litmus paper turns red when dipped in an acidic liquid.
How do you cure a paper cut?
Lemon juice.
Does lemon juice ink really work on paper?
Lemon juice is acidic and weakens paper. When paper is heated, the remaining acid turns the writing brown before discoloring the paper.Squeeze lemons to obtain their juice or obtain bottled lemon juice.Use the juice as 'ink' by applying it to a stick or paintbrush and writing on paper.Allow the paper to dry.When you are ready to read your invisible message, hold the paper up to sunlight, a lightbulb (recommended), or other heat source.The heat will cause the writing to darken to a pale brown, so your message can now be read.Another way to read the message is to put salt on the drying 'ink'. After a minute, wipe the salt off and color over the paper with a wax crayon to reveal the message.Tips:Experiment with other juices. White wine, orange juice, vinegar, and apple juice all work well, too.A cotton swab makes an excellent disposable 'paintbrush'.The writing turns brown because the weakened paper burns before the rest of the paper. Be careful not to overdo your heating and ignite the paper!What You Need:Lemon or Lemon JuiceSunlight or Heat SourcePaperPaintbrush or Stick
What effect does lemon juice have on a red and blue litmus paper?
Lemon juice is an acid therefore, it turns blue litmus paper red and red litmus paper remains red
What happens when you burn a paper with lemon juice on it?
When you put lemon juice on a piece of paper, then place the paper on a heat source, the parts soaked with the juice will burn faster and turn a dark brown. This chemical reaction is based upon the properties that define acids and bases. The paper with the acid lemon juice is weakened by the acid, and will burn faster.
What is the colour of lemon juice PH paper?
Red
How do you write a secret message with a lemon?
Pour lemon juice into a glass. Dip a cotton wool bud into it and use it to write your message on paper. You can re-dip the bud if it dries out. Let your writing dry; it should become invisible. To make it visible, hold it to a strong light or iron it because lemon juice darkens when heated.
