Attach a specialized shading needle to the tattoo gun (This must be sterilized). The tip of the shading needle is made up of a number of tiny needles that are specifically measured and fitted so that they inject the skin in exactly the right depth.
Grease the relevant area of skin by applying a thin layer of lubricant before beginning the shading. This will ensure that the needle can glide easily across the skin to increase the standard of the final piece.
Begin shading. Move the tattoo gun slowly over the skin to create a dark shading effect. To create a lighter effect move the gun across the skin at a quicker pace while being less invasive with the needle. After completing each small section of the tattoo, wipe with a clean cloth to get rid of any excess ink and view the section clearly.