Fluorescent invisible ink

Invisible ink is of many different types. From juice of citrus fruits, to milk and of course the kind that can be made from cornstarch. There are a number of choices for your invisible ink. Unfortunately once the iodine solution has been dabbed on to the paper the invisible ink becomes visible and can be read quite easily.

There is however one kind of invisible ink which remains hidden even after you have read it.  That clear fluid you see may be more sinister than it appears. It could be fluorescent invisible ink that you could use to write on any surface. The only way it will be read if some used an ultra violent light to show it. When the light is switched off no one is the wiser about the secret message given by the ink.

Did you know that most bodily fluids are fluorescent by nature? It has been proved by science that blood semen, saliva, vaginal fluids are all naturally fluorescent. Thant means that a crime scene investigator can narrow down his scope of investigation by merely shining an ultra violet light on the area to see where the human bodily fluids prevail. This technique is usually seen in television shows as the investigator flashes a hand held portable ultra violet light around the body to see where all the blood has been washed up.