It depends on what type of ink your talking about so let's start with the tattoo ink tattoo ink stays on forever and if you do get a lot of tattoo's you can catch a an infection or something like that. Now for the pen or marker who can catch ink poisoning for it more quicker than tattoo ink it can give rashes and they can be very annoying ata some point of so basically all ink is even the octopus ink
It forces the ink into your skin.
If it doesn't go deep enough into the skin then the skin could reject the ink or get infected.
skin candy
No, the ink goes no further that the skin.
Tattoos stay in the skin because the ink is deposited into the dermis layer, which is more stable and permanent than the outermost layer of skin. Even though skin cells are constantly being replaced, the ink particles are large enough to be retained in the dermis.
Usually I would be recommending people NOT to use India Ink, but if it is just for practice on fake skin, the India Ink will be more than satisfactory. Since what you are tattooing is more akin to plastic than skin, it won't bleed like it would in the skin, and will allow you to hone your lining skills.
Writing with a pen on your skin can cause the ink to be absorbed into the skin, potentially leading to irritation, allergic reactions, or staining of the skin. Additionally, it can be difficult to remove the ink completely, especially if left on for an extended period of time.
Carbon black ink from Xerox and other copier toners can contain impurities that are known carcinogens. Prolonged exposure to this ink within the skin can cause skin and lung irritation.
It forces the ink into your skin.
Normally, tatoo shops inject it. Well, they put the ink on the needle, and it stabs and leaves the ink in the skin. Some people who do it from home, burn it.
Highlighter ink will not harm you as long as you don't have it inside your skin.
Yes! It is generally unsafe for ANYONE to put permanant marker on their skin! Especially permanant, because it can not be washed off, your skin (like a sponge) absolves the ink and it goes into your bloodstream causing potential ink poisoning.