how do you make invisible ink? Can you see the details before you answer?

Question

I have tried the lemon juice and milk. It doesn't work. I know you have to let it dry but is there a certain time frame? I have not tried the baking soda yet but I intend to. Links to other sites would be appreciated but if you know something that would be great.

Hey dumbass (boredomkills85) I'm doing this for a group of younger Boy Scouts. We do a weekly science project. You've got to be a child or never have grown up to answer a question like that. Either that our you don't have a life. Get a job man. BTW I'm off today.

Answer 1

I just googled this for you and it gave me 3 recipes for invisible ink. So I will give you 2 and if you want go to the link and get the other recipe. That one involves the stove. Since you said you were doing this for boyscouts I thought you would like to keep it simple! Have fun!

Lemon Invisble Ink
What You Need:
Lemon or Lemon Juice
Sunlight or Heat Source
Paper
Paintbrush or Stick
Here's How:
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!

Baking Soda invisible Ink
What You Need:
Baking Soda
Paper
Water
Light Bulb (heat source)
Paintbrush or Swab
Measuring Cup
Purple Grape Juice (opt.)
There are at least two methods to use baking soda as an invisible ink. Mix equal parts water and baking soda.
Use a cotton swab, toothpick, or paintbrush to write a message onto white paper, using the baking soda solution as 'ink'.
Allow the ink to dry.
One way to read the message is to hold the paper up to a heat source, such as a light bulb. The baking soda will cause the writing in the paper to turn brown.
A second method to read the message is to paint over the paper with purple grape juice. The message will appear in a different color.
Tips:
If you are using the heating method, avoid igniting the paper - don't use a halogen bulb.
Baking soda and grape juice react with each other in an acid-base reaction, producing a color change in the paper.
The baking soda mixture can also be used more diluted, with one part baking soda to two parts water.
Grape juice concentrate results in a more visible color change than regular grape juice.

Answer 2

Many years ago I used just plain lemon juice.
Remove as much o the pulp as possible so it is very clear.
Let it dry.
To view what was written, just heat the parer (like warming it over a light bulb) and the message will appear.

Answer 3

you can use lemon juice, baking soda, or starch and iodine. here are the links:

http://chemistry.about.com/cs/howtos/ht/invisibleink3.htm
http://chemistry.about.com/cs/howtos/ht/invisibleink1.htm
http://chemistry.about.com/cs/howtos/ht/invisibleink2.htm

Answer 4

are you this childish or are you like 5 or something?