Wall Clock Great
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Concrete construction material that will display images?
I remember reading in Readers Digest, or in a magazine similar, about this new type of concrete that when built, acts like a HUGE black & white TV screen. I remember in the article there was a picture of a wall, displaying a clock on it.
What was this material called? I would like to research it further for a class I am taking in school.
Any extra information you could supply would be great, too!
It's unlikely the concrete played an active role in displaying the images.
More likely: they added a bunch of little reflective glass cubes, like sugar crystals, to the concrete mix.
The little cubes reflect a LOT of light back, making an excellent projection screen. In fact that's what the old screens were coated with.
It probaboy did not catch on due to high cost. and 99% of the glass beads are wasted as they're inside the wall, not on the surface where they do any good.
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