Can someone let me know if the following happens? I trace a stencil onto tracing paper with the hectograph paper underneath. When i then put the stencil onto somones skin, do tattoo shops just re-trace over the lines, to in effect reload the stencil with carbon, or do they go through the whole process again from the start, including tracing the image with pencil onto a new piece of tracing paper? Some may say there is a bit of a hygiene issue here, but not really, as the skin has not yet been punctured. Your thought please, and what do you do with your stencils.