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4D Firetacks


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How big is a piece of tape?

 

Some tapes reflect better than others. Some are very disappointing, depending on the angle, lighting, and distance -- maybe it's not a big deal depending on your cache idea. Here's an expensive tape that's super bright:

http://reflectivelyyours.com/generic144.html

That's a honeycomb pattern, and you may need to cut out just the center of the honeycomb to stick on thumbtacks. With age, tape can get brittle, peel, and lose some reflectiveness. I also agree with JackQuest, that you should look for pre-made reflective thumbtacks.

 

You could instead put a layer of epoxy on a thumbtack, press it into a cup of glass beads, and make thousands of the thumbtacks yourself. Safety stores sell the reflective beads for road stripes.

Edited by kunarion
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