The final digital image file is then printed on transfer paper, using the previous print settings. The prints can be stored in this form until used.

To determine if the 2D transfer tattoo produced in this manner is authentic, it needs to be fixed onto the intended wearer. For this, the front of the print is sprayed with adhesive spray and left until completely dry. Scissors are used to cut off superfluous sections. It is then placed onto the intended place on the wearer’s body, the paper facing upwards, away from the body (i.e., the print facing the SP’s skin). The paper is then soaked with water until it can be moved sideways, carefully, and easily. Once any remaining water has evaporated, 96% isopropyl-soaked cotton swabs can be used to remove any unwanted residual paste on the edges. Then sealer2 is applied gently with a fresh cotton swab, airbrush, or sponge, covering the whole moulage and immediately adjacent areas and left until completely dry.3 The sealer fixes the moulage, so it does not stick, collect lint or tear when manipulated.4 The applied transfer tattoo can now be judged against prior established criteria or other tools [25]. If unsatisfactory, earlier steps must be revisited. As soon as the product is satisfactory, production can start. Figure Figure11 depicts an example of a print in need of further editing.

A 2D tattoo prototype of splinter nails on a healthy 40-year-old SP’s middle finger, intended for a case of bacterial endocarditis. The haemorrhages should be less sequential but continuous, parallel to each other as well as the nail’s growth lines. The colouring suggests an old subungual haemorrhage

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