Hello In case you want to Get The UV maps From The Tattoo dev kit (obj file aka wavefront) To make tattoos using the UV maps and you are using Blender .
Here easy steps on how to Do it
I made Some pics to guide you
1)click File >>Import >>>wavefront (.obj)
2)as you see in pic 2 we have imported the Obj file
3) click Obj>>>go edit mode and it will look like pic 3
4) click UV >>>export UV layout also make sure to check with tick (all UVS ) and ofc png format
and ur all set have fun
PS. blender 2.8 version