Hi, I'm NewDecrypter just looking at learning more about getting Tattoos and Tattooing in general! I have some tattoo ink that I'm looking at using at some stage to stick and poke myself from an online site but it has no expiry date. How will I know if it is safe to use or not? I purchased in 2021. I read most tattoo inks have shelf life of about 2 years but need more clarity. Thanks!