Dear Lab Guy, I tried using your Autoradiography pens on X-Ray film, but I can barely see it when I’m writing it down. Is this normal?
Yes, you won’t see it well under normal light which is normal. The markings from SP Bel-Art Autoradiography Pens becomes clear after the X-Ray is developed, or even under a UV light, which is where I shot this photo.
In the image, it was interesting that the fluorescent marker (pictured at the bottom) did not catch at all. I did not expose the writing to a long period of light – the results may have been even starker if I really let the writing sit in the sun. Also pictured is the SP Bel-Art Fluorescent Ruler.
I hope this helped and answered your question. Thanks for writing in, and please feel free to write back if I can help in any other way.
Yours in science, Lab Guy
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