How to prepare a stencil for a thermal printer, step by step
Reviewed on October 16, 2026
A thermal stencil printer burns the carbon paper dot by dot: it only understands black or nothing, at 203 or 300 dots per inch. A well-prepared file is half of a good transfer.
1. Start with the real size
First decide the width of the tattoo on the skin: line weight, screen spacing and speck clean-up all depend on it. Measure the area and enter the width in millimetres.
If it goes on an arm or a leg, mind the curve: a wide design looks narrower from the front than it measures on paper.
2. Clean up the original
Photos of sketches bring grey paper, shadows and edges that the printer turns into smudges. Even out the paper and remove the background colour before going on.
3. Lines that transfer
At 203 dpi one printer dot is 0.125 mm. A one-dot line barely transfers: aim for strokes of at least 0.3 mm and thicken thin lines slightly if needed.
Remove stray specks: on the skin they look like mistakes.
4. Large blacks: outline and marks
A solid black loads the carbon paper and smudges. Keep the outline and mark the inside with spaced lines or dots: the fill stays recognisable and the stencil stays clean.
5. Shading as a screen
Greys don’t exist for a thermal printer. Turn them into hatching or dots at a low density: the stencil guides the shading, it doesn’t paint it.
6. Print at 100 %
Export a real-size PDF or a 1-bit PNG that carries its resolution. Print without “fit to page” and measure the 10 mm ruler before transferring.