They’ve created a liquid ink that can be sprayed directly onto a person’s scalp, forming an ultra-thin electronic tattoo.

But if you’ve already lost some hair and want to make your scalp look less sparse or patchy, these tattoos — when done well — can look just like hair and help restore your self-esteem.

The scalp camouflage needle is similar to that of a tattoo needle. It's this three-prong that creates the perfect size of a hair follicle. Unlike tattooing, this one will eventually fade over time ...

The ink formula can also be modified to create tattoo lines onto the scalp, meaning that the wires that connect the e-tattoos to a monitor are much shorter than they would be in a regular EEG test.