

Hello, this is my 5th time tattooing on real sking. I thought i had it good.
But its not healing well (see 2nd image) 9 days already. I used pentype machine
7rl for lining and 13rm for coloring. starbrite inks.
I'm on 6 to 6.5 volts only. I'm not confident dialing higher than 7 volts.
Am i overworking or getting too deep?