Lindsey+L13


 * TIME IT TOOK HAND-MADE INVISIBLE INK TO APPEAR **

Lindsey L

2012-2013


 * ABSTRACT **

The purpose of this study was to find out how fast invisible ink (lemon juice) can appear with variations and compared to other acids. Invisible ink can be traced to ancient times and has been very helpful during times of war. The ideal invisible ink is not easily seen in sideways light and is invisible under ultraviolet light. Lemon juice was mixed with many things, stored in different places and compared with other acids. Lemon juice with nothing added to it and stored in a room temperature room and timed was the best appearing and fastest ink. The results were this way scientifically because all the things added were lessening the acid content so it took longer to appear. If ink is stored in cold places the acid is put to sleep by the cold so it takes longer to wake up.


 * EXPERIMENTAL IMPROVEMENTS AND FUTURE EXPERIMENTS **

An improvement to this experiment would be to come up with more original experiments this way people would be more interested in the experiments. Another way to improve the experiment would use fresh lemon juice. For a future experiment try comparing how long fresh cut and squeezed lemon juice has sat out before applied to paper.

To read the complete ISP Paper for this experiment, click on the PDF file link below: