far, but now here's the last. Does anyone know specifically what the chemical was to be used to make it change color? I see a new line of color changing glass tiles (see an example of Flash animation of the pictures here: http://www.movingcolor.net/products_northern.html) and I was thinking you could probably do it myself if I knew that the chemicals needed to produce a composite heat-sensitive color change and spread it in the back of the tile clear. Any suggestions?

It sounds as if it comes to mood rings. If you check out this link http://en.wikipedia.org/wiki/Mood_Rings

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