This disorder is associated with several vascular, neurological, and skeletal problems including stroke, heart attack, clotting, mental retardation, eye abnormalities, and osteoporosis, amongst many other complications.
Tattoo tipping etiquette, in general, should hover around 15% for small tattoos and 20% for larger tattoos, but as with all tips, you as a customer ultimately determine the amount based on the quality of service and the work performed. Consider your involvement as well.
Needham acknowledges that the minimum acceptable tip locally nowadays is around 12 to 15 per cent of the total bill -- he revealed that he tips taxis $100 on a $600 bill (16 per cent).