In 1980s what was covering an unwanted tattoo with black tattoo called, specifically by tattoists?

@ChipmunkErnie Did it happen to you?

@Oldanglaisadverbs Nope, I have no tattoos, never wanted any. It would be like spraying graffiti on work of fine art. ;) (Well, okay -- I had four little dots tattooed on my tummy as a guide for radiation cancer treatments, but medicinal tats don't count, right?)