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| Brightidea |
 Posted: Sat Jul 05, 2008 6:34 am Post subject: Light reactive chemical/ink |
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Forum Freshman
Joined: 05 Jul 2008
Posts: 1
Location: UK
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Hi,
I'm currently in the process of designing a product. It needs to work like invisible ink, but instead of reacting to UV light, I need it to show up when exposed to a normal bright light source. For instance if this clear ink was used on a piece of paper, then photocopied, it would show up on the print. Although the ink on the original piece of paper would remain invisible. I'm not sure if any chemicals used during the process of film developing would be useful? The chemical must be safe to use and be non permanent if used on glass. Any comments or suggestions would be greatly appreciated.
Thanks |
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| William McCormick |
| Posted: Sat Jul 05, 2008 4:09 pm Post subject: Re: Light reactive chemical/ink |
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Forum Ph.D.
Joined: 03 Apr 2008
Posts: 1011
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| Brightidea wrote: |
Hi,
I'm currently in the process of designing a product. It needs to work like invisible ink, but instead of reacting to UV light, I need it to show up when exposed to a normal bright light source. For instance if this clear ink was used on a piece of paper, then photocopied, it would show up on the print. Although the ink on the original piece of paper would remain invisible. I'm not sure if any chemicals used during the process of film developing would be useful? The chemical must be safe to use and be non permanent if used on glass. Any comments or suggestions would be greatly appreciated.
Thanks |
How about a reflective type of substance. Similar to road sign coatings. In normal light they appear to be normal. Yet under bright light they shine.
You could set the photo copier to a dark setting and this special area would not print.
Sincerely,
William McCormick
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http://www.Rockwelder.com |
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