Can I practice with India Ink?

So I’ve recently (very recently) gotten into tattooing. I have my machine and the needles and everything, but the rest of my package is apparently coming from overseas, so I don’t have my ink yet! I really wanna start using my machine though! I have the fake silicone skin, and the stencils, so I’m wondering if I can use India ink? (Please don’t tell me “don’t use India ink on skin!” I’m aware of this, and I’m not planning to use it on skin, Only silicone!)