Can India ink be used to tattoo?

Technically yes, but how do you know it is true India ink...Many inks used for drafting and such have 'fast dryers' in them to cause the ink to dry without blotting...These 'fast dryers' are know to have abrasive chemicals in them that do not set well in the skin without reactions....

Also many less than honest vendors will label a permanent ink as India ink just because it is somewhat permanent....And, if you see a colored ink set that is labeled 'India' ink, it is a sham and a lie....Black is the only shade of real India ink...Hope this helps..