1
Chemistry / Re: Invisible Ink formula anyone?
« on: 17/06/2005 23:32:48 »
If you want to write on a surface ,containing polysaccharides (paper,some sorts of clothes) you can use concentrated acetic acid. It causes hydrolisis of polymer chains. After writing on the material, just let it dry out and letters will disappear. Then, when material is put into water letters again appear as a "water signs".