Why can't tattoos be colored with embroidery needles? What should I color it with?

The embroidery needle is too thin. Use the largest needle, find a few more to put together, and then wind the thread into a certain length (fixed depth), so that you can tie the pattern. Apply paint after bleeding. This is the most primitive method. Not recommended. It hurts and is easily inflamed. The most important thing is that the pattern of the tie will be ugly.