I am thinking about getting a tattoo. Do you know much about the art form of tattooing?
Yes it has been practiced since the Neolithic age. We know this from mummified skin and ancient art!
Oh wow. I wonder what they were tattooing on them selves. I am not sure myself. Are there different methods?
I also wonder what they tattooed.... Various colorings can be used, such as ink dyes or pigments.
I mostly see only black ink. I sometimes forget that different colors are an option.
Tattoo
A tattoo is a form of body modification where a design is made by inserting ink, dyes and pigments, either indelible or temporary, into the dermis layer of the skin to change the pigment. The art of making tattoos is tattooing. 
Tattoos fall into three broad categories: purely decorative (with no specific meaning); symbolic (with a specific meaning pertinent to the wearer); pictorial (a depiction of a specific person or item). In addition, tattoos can be used for identification such as
History of tattooing
Tattooing has been practiced across the globe since at least Neolithic times, as evidenced by mummified preserved skin, ancient art and the archaeological record. Both ancient art and archaeological finds of possible tattoo tools suggest tattooing was practiced by the Upper Paleolithic period in Europe. However, direct evidence for tattooing on mummified human skin extends only to the 4th millennium BC. The oldest discovery of tattooed human skin to date is found on the body of Ötzi the Iceman, dating to between 3370 and 3100 BC. Other tattooed