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Pen with Invisible Ink
- 10.95 $
- Sku: SPT-SHT-UVM-1
The markings remain invisible until examined under an ultraviolet light source. *** IMPORTANT*** May not work well on some white papers, recommended for use on colored paper.
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The markings remain invisible until examined under an ultraviolet light source.
*** IMPORTANT***
May not work well on some white papers, recommended for use on colored paper.
