it is veg tanned leather , all the neeldes and ink are the same, it is harder than tattooing skin just because the leather is harder than skin i didnt use any sealer prior to tattooing it, id say if you are not alrady a tattoo artist tattooing leather will be a bit difficult, the koi was the first thing i tattooed on leather i just wanted to see if it would work, i wish there was more info i could give but my tattooing background is was made me able to do it on leather . any questions feel free to pm me thanks , and thanks for the compliment