The answer is no, because there is no drying cycle, just like there are real cars. I don't know that a single regulator will accept them. They are unreliable to 240 degrees - the minimum - at constant temperature.
As people have said, you can time the color index before it changes. This is also misinformation. You can expose the bag for a few minutes and the color will change. On a hot sunny day, you can put the package on your dashboard and the color will change. This is useless.
Home tattoo? Give me a break. Unless the home studio is legal and authorized, there is no reason to have a tattoo in someone's home. Friends should have a professional environment like everyone else. I fired the artists who were found to be performing outdoor tattoos.
By the way, the dry heat sterilizer must run for an hour. These are not recognised by regulators.
