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  to make invisible ink we needed phosphorescent powder and something to bind it to. after some tests we chose clear water-based ink.

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  it takes very little powder to make the ink phosphoresce. this makes invisible ink an affordable source of AWESOME!

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  h3>we checked our ink mix under a black light bulb we got at home depot. it was quite satisfactory.
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  we then applied the invisible ink to our stencil...

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  and viola!