All the accessories for inking are placed at the end of the machine, the ink itself being supplied from a ductor, which can be so regulated by the keys attached to it as to let out the precise amount of pigment required.
The inking arrangements are placed at the two extreme ends of these four drums or cylinders, thus being near the type surfaces in each case.
A double inking apparatus is of course necessary, and the inking arrangements are placed at the two extreme ends of the machine.
There are always risks with inking, and skin infections do require a trip to the doctor.
The popularity of Celtic design tattoos means that many tattoo artists and shops are expert at inking this sort of design.