Shh,... A secret

Chemistry is extremely mysterious and is used for so many mysterious purpose too..Its not only the tool of researchers and teachers. But even the thieves and terrorists use (misuse?) chemistry. An example is black money spam. People cheat the governnment by coating a black substance over the money. And nobody knows what this black substance is.. Cash coated with this black substance looks like a black x ray sheet.. Smugglers and other thieves can thus transport it without the detection of customs.. Its heard that, the black substance used for coating is iodine and a special type of glue..Now they remove this black coating using a secret and expensive ( mysterious too) solution called SSD automatic solution. Its very secret solution, and commoners cant even know the expansion of S.S.D. Really mysterious is'nt it?