Re: Other things like henna?

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: What about iodine? Is that dangourous? : : The short answer is no. : : There are very, very few molecules small enough to penetrate skin, : and : : fewer still that do so without hurting the body that is inhabiting : the : : skin. About the only molecule that will safely penetrate down 20 : or : : so cells into the outer layer of your skin (the dead part) and bind : : with the collagen safely is henna's hennotannic acid. The : : gallotannins will stain a little ... clove and oak gall. But : they're : : just not as good. A few other tannins have some effect ... Betel, : and : : walnut .... but again none of those have anywhere near the : penetrating : : and staining quality of henna does on skin at body temperature : without : : a mordant. : : Blue, green, purple etc. dye molecules are too big. Even the : indigo : : and woad molecules only go the top couple of cells, so that just : lasts : : a day or three. When you tie dye shirts .... all that hot dye bath, : : and your hands still clean up in two days tops. : : The food coloring sort of dyes used in colored henna again only : : penetrate one or two of the top most dessicated and porous of your : : skin cells so that's gone fast too. Mostly harmless, but not : : longlasting like henna. Paint and Temptu just sit right on top of : : your skin. : : One molecule that will penetrate is PPD .... a very small molecule : : that will go through your skin and stain it black all the way down : BUT : : PPD IS TOXIC and it will penetrate to the blood bearing layer!!!! : : There it causes chemical burns and more havoc if it gets into your : : blood stream. : : If you could take off your skin, you could boil it, mordant it, : strip : : it, and turn it all sorts of wonderful colors with leather, fur, : hair : : and wool dyes...... but those things would not be suitable for your : : skin while you're the living, sentient inhabitant therein. : : You can oxidize or percipitate your henna stain to black .... email : me : : if you want the instructions. It's comparable to the henna stone : : thing that's used in North Africa and all. : : : : (Pardon me while I get off on a rant here .... I was talking to : some : : hairdressers recently, and they are truely experts on just how : awful : : the effects of ppd and other dyes can be on skin, because they : : regularly see people who have nuked their hair with ppd black hair : : dye, and forever after need wigs.)

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