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What the Inside of an Aquafresh Tube Looks Like

(Photo: unknown)

The toothpaste brand Aquafresh is noted for its colorful presentation that comes out with every squirt. How does it work? To find out, freeze a tube, then cut it open. The colors run smoothly from one end to the other. So, to answer your question: magic.

-via Brian Ashcraft

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And industrial extruders.....
Back in the sixties, I was an ever curious kid, and there was a brand of toothpaste called 'Signal', which had red stripes. I of course had to dismantle the tube to find out how it was done. There was a collar device in the tube nozzle that dispensed the red mouthwash sripes using laminar flow. However, the tube above is the result of a multi-nozzle shaped extrusion.
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